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- /*
- * tclExecute.c --
- *
- * This file contains procedures that execute byte-compiled Tcl
- * commands.
- *
- * Copyright (c) 1996-1997 Sun Microsystems, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- *
- * SCCS: @(#) tclExecute.c 1.95 97/08/12 17:06:49
- */
-
- #include "tclInt.h"
- #include "tclCompile.h"
-
- #ifdef NO_FLOAT_H
- # include "../compat/float.h"
- #else
- # include <float.h>
- #endif
- #ifndef TCL_NO_MATH
- #include "tclMath.h"
- #endif
-
- /*
- * The stuff below is a bit of a hack so that this file can be used
- * in environments that include no UNIX, i.e. no errno. Just define
- * errno here.
- */
-
- #ifndef TCL_GENERIC_ONLY
- #include "tclPort.h"
- #else
- #define NO_ERRNO_H
- #endif
-
- #ifdef NO_ERRNO_H
- int errno;
- #define EDOM 33
- #define ERANGE 34
- #endif
-
- /*
- * Boolean flag indicating whether the Tcl bytecode interpreter has been
- * initialized.
- */
-
- static int execInitialized = 0;
-
- /*
- * Variable that controls whether execution tracing is enabled and, if so,
- * what level of tracing is desired:
- * 0: no execution tracing
- * 1: trace invocations of Tcl procs only
- * 2: trace invocations of all (not compiled away) commands
- * 3: display each instruction executed
- * This variable is linked to the Tcl variable "tcl_traceExec".
- */
-
- int tclTraceExec = 0;
-
- /*
- * The following global variable is use to signal matherr that Tcl
- * is responsible for the arithmetic, so errors can be handled in a
- * fashion appropriate for Tcl. Zero means no Tcl math is in
- * progress; non-zero means Tcl is doing math.
- */
-
- int tcl_MathInProgress = 0;
-
- /*
- * The variable below serves no useful purpose except to generate
- * a reference to matherr, so that the Tcl version of matherr is
- * linked in rather than the system version. Without this reference
- * the need for matherr won't be discovered during linking until after
- * libtcl.a has been processed, so Tcl's version won't be used.
- */
-
- #ifdef NEED_MATHERR
- extern int matherr();
- int (*tclMatherrPtr)() = matherr;
- #endif
-
- /*
- * Array of instruction names.
- */
-
- static char *opName[256];
-
- /*
- * Mapping from expression instruction opcodes to strings; used for error
- * messages. Note that these entries must match the order and number of the
- * expression opcodes (e.g., INST_LOR) in tclCompile.h.
- */
-
- static char *operatorStrings[] = {
- "|", "^", "&", "==", "!=", "<", ">", "<=", ">=", "<<", ">>",
- "+", "-", "*", "/", "%", "+", "-", "~", "!",
- "BUILTIN FUNCTION", "FUNCTION"
- };
-
- /*
- * Mapping from Tcl result codes to strings; used for error and debugging
- * messages.
- */
-
- #ifdef TCL_COMPILE_DEBUG
- static char *resultStrings[] = {
- "TCL_OK", "TCL_ERROR", "TCL_RETURN", "TCL_BREAK", "TCL_CONTINUE"
- };
- #endif /* TCL_COMPILE_DEBUG */
-
- /*
- * The following are statistics-related variables that record information
- * about the bytecode compiler and interpreter's operation. This includes
- * an array that records for each instruction how often it is executed.
- */
-
- #ifdef TCL_COMPILE_STATS
- static long numExecutions = 0;
- static int instructionCount[256];
- #endif /* TCL_COMPILE_STATS */
-
- /*
- * Macros for testing floating-point values for certain special cases. Test
- * for not-a-number by comparing a value against itself; test for infinity
- * by comparing against the largest floating-point value.
- */
-
- #define IS_NAN(v) ((v) != (v))
- #ifdef DBL_MAX
- # define IS_INF(v) (((v) > DBL_MAX) || ((v) < -DBL_MAX))
- #else
- # define IS_INF(v) 0
- #endif
-
- /*
- * Macro to adjust the program counter and restart the instruction execution
- * loop after each instruction is executed.
- */
-
- #define ADJUST_PC(instBytes) \
- pc += instBytes; continue
-
- /*
- * Macros used to cache often-referenced Tcl evaluation stack information
- * in local variables. Note that a DECACHE_STACK_INFO()-CACHE_STACK_INFO()
- * pair must surround any call inside TclExecuteByteCode (and a few other
- * procedures that use this scheme) that could result in a recursive call
- * to TclExecuteByteCode.
- */
-
- #define CACHE_STACK_INFO() \
- stackPtr = eePtr->stackPtr; \
- stackTop = eePtr->stackTop
-
- #define DECACHE_STACK_INFO() \
- eePtr->stackTop = stackTop
-
- /*
- * Macros used to access items on the Tcl evaluation stack. PUSH_OBJECT
- * increments the object's ref count since it makes the stack have another
- * reference pointing to the object. However, POP_OBJECT does not decrement
- * the ref count. This is because the stack may hold the only reference to
- * the object, so the object would be destroyed if its ref count were
- * decremented before the caller had a chance to, e.g., store it in a
- * variable. It is the caller's responsibility to decrement the ref count
- * when it is finished with an object.
- */
-
- #define STK_ITEM(offset) (stackPtr[stackTop + (offset)])
- #define STK_OBJECT(offset) (STK_ITEM(offset).o)
- #define STK_INT(offset) (STK_ITEM(offset).i)
- #define STK_POINTER(offset) (STK_ITEM(offset).p)
-
- /*
- * WARNING! It is essential that objPtr only appear once in the PUSH_OBJECT
- * macro. The actual parameter might be an expression with side effects,
- * and this ensures that it will be executed only once.
- */
-
- #define PUSH_OBJECT(objPtr) \
- Tcl_IncrRefCount(stackPtr[++stackTop].o = (objPtr))
-
- #define POP_OBJECT() \
- (stackPtr[stackTop--].o)
-
- /*
- * Macros used to trace instruction execution. The macros TRACE,
- * TRACE_WITH_OBJ, and O2S are only used inside TclExecuteByteCode.
- * O2S is only used in TRACE* calls to get a string from an object.
- *
- * NOTE THAT CLIENTS OF O2S ARE LIKELY TO FAIL IF THE OBJECT'S
- * STRING REP CONTAINS NULLS.
- */
-
- #ifdef TCL_COMPILE_DEBUG
-
- #define O2S(objPtr) \
- Tcl_GetStringFromObj((objPtr), &length)
-
- #ifdef TCL_COMPILE_STATS
- #define TRACE(a) \
- if (traceInstructions) { \
- fprintf(stdout, "%d: %d,%ld (%u) ", iPtr->numLevels, \
- stackTop, (tclObjsAlloced - tclObjsFreed), \
- (unsigned int)(pc - codePtr->codeStart)); \
- printf a; \
- fflush(stdout); \
- }
- #define TRACE_WITH_OBJ(a, objPtr) \
- if (traceInstructions) { \
- fprintf(stdout, "%d: %d,%ld (%u) ", iPtr->numLevels, \
- stackTop, (tclObjsAlloced - tclObjsFreed), \
- (unsigned int)(pc - codePtr->codeStart)); \
- printf a; \
- bytes = Tcl_GetStringFromObj((objPtr), &length); \
- TclPrintSource(stdout, bytes, TclMin(length, 30)); \
- fprintf(stdout, "\n"); \
- fflush(stdout); \
- }
- #else /* not TCL_COMPILE_STATS */
- #define TRACE(a) \
- if (traceInstructions) { \
- fprintf(stdout, "%d: %d (%u) ", iPtr->numLevels, stackTop, \
- (unsigned int)(pc - codePtr->codeStart)); \
- printf a; \
- fflush(stdout); \
- }
- #define TRACE_WITH_OBJ(a, objPtr) \
- if (traceInstructions) { \
- fprintf(stdout, "%d: %d (%u) ", iPtr->numLevels, stackTop, \
- (unsigned int)(pc - codePtr->codeStart)); \
- printf a; \
- bytes = Tcl_GetStringFromObj((objPtr), &length); \
- TclPrintSource(stdout, bytes, TclMin(length, 30)); \
- fprintf(stdout, "\n"); \
- fflush(stdout); \
- }
- #endif /* TCL_COMPILE_STATS */
-
- #else /* not TCL_COMPILE_DEBUG */
-
- #define TRACE(a)
- #define TRACE_WITH_OBJ(a, objPtr)
- #define O2S(objPtr)
-
- #endif /* TCL_COMPILE_DEBUG */
-
- /*
- * Declarations for local procedures to this file:
- */
-
- static void CallTraceProcedure _ANSI_ARGS_((Tcl_Interp *interp,
- Trace *tracePtr, Command *cmdPtr,
- char *command, int numChars,
- int objc, Tcl_Obj *objv[]));
- static void DupCmdNameInternalRep _ANSI_ARGS_((Tcl_Obj *objPtr,
- Tcl_Obj *copyPtr));
- static int ExprAbsFunc _ANSI_ARGS_((Tcl_Interp *interp,
- ExecEnv *eePtr, ClientData clientData));
- static int ExprBinaryFunc _ANSI_ARGS_((Tcl_Interp *interp,
- ExecEnv *eePtr, ClientData clientData));
- static int ExprCallMathFunc _ANSI_ARGS_((Tcl_Interp *interp,
- ExecEnv *eePtr, int objc, Tcl_Obj **objv));
- static int ExprDoubleFunc _ANSI_ARGS_((Tcl_Interp *interp,
- ExecEnv *eePtr, ClientData clientData));
- static int ExprIntFunc _ANSI_ARGS_((Tcl_Interp *interp,
- ExecEnv *eePtr, ClientData clientData));
- static int ExprRandFunc _ANSI_ARGS_((Tcl_Interp *interp,
- ExecEnv *eePtr, ClientData clientData));
- static int ExprRoundFunc _ANSI_ARGS_((Tcl_Interp *interp,
- ExecEnv *eePtr, ClientData clientData));
- static int ExprSrandFunc _ANSI_ARGS_((Tcl_Interp *interp,
- ExecEnv *eePtr, ClientData clientData));
- static int ExprUnaryFunc _ANSI_ARGS_((Tcl_Interp *interp,
- ExecEnv *eePtr, ClientData clientData));
- #ifdef TCL_COMPILE_STATS
- static int EvalStatsCmd _ANSI_ARGS_((ClientData clientData,
- Tcl_Interp *interp, int argc, char **argv));
- #endif /* TCL_COMPILE_STATS */
- static void FreeCmdNameInternalRep _ANSI_ARGS_((
- Tcl_Obj *objPtr));
- static char * GetSrcInfoForPc _ANSI_ARGS_((unsigned char *pc,
- ByteCode* codePtr, int *lengthPtr));
- static void GrowEvaluationStack _ANSI_ARGS_((ExecEnv *eePtr));
- static void IllegalExprOperandType _ANSI_ARGS_((
- Tcl_Interp *interp, unsigned int opCode,
- Tcl_Obj *opndPtr));
- static void InitByteCodeExecution _ANSI_ARGS_((
- Tcl_Interp *interp));
- static void PrintByteCodeInfo _ANSI_ARGS_((ByteCode *codePtr));
- static int SetCmdNameFromAny _ANSI_ARGS_((Tcl_Interp *interp,
- Tcl_Obj *objPtr));
- #ifdef TCL_COMPILE_DEBUG
- static char * StringForResultCode _ANSI_ARGS_((int result));
- #endif /* TCL_COMPILE_DEBUG */
- static void UpdateStringOfCmdName _ANSI_ARGS_((Tcl_Obj *objPtr));
- #ifdef TCL_COMPILE_DEBUG
- static void ValidatePcAndStackTop _ANSI_ARGS_((
- ByteCode *codePtr, unsigned char *pc,
- int stackTop, int stackLowerBound,
- int stackUpperBound));
- #endif /* TCL_COMPILE_DEBUG */
-
- /*
- * Table describing the built-in math functions. Entries in this table are
- * indexed by the values of the INST_CALL_BUILTIN_FUNC instruction's
- * operand byte.
- */
-
- BuiltinFunc builtinFuncTable[] = {
- #ifndef TCL_NO_MATH
- {"acos", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) acos},
- {"asin", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) asin},
- {"atan", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) atan},
- {"atan2", 2, {TCL_DOUBLE, TCL_DOUBLE}, ExprBinaryFunc, (ClientData) atan2},
- {"ceil", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) ceil},
- {"cos", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) cos},
- {"cosh", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) cosh},
- {"exp", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) exp},
- {"floor", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) floor},
- {"fmod", 2, {TCL_DOUBLE, TCL_DOUBLE}, ExprBinaryFunc, (ClientData) fmod},
- {"hypot", 2, {TCL_DOUBLE, TCL_DOUBLE}, ExprBinaryFunc, (ClientData) hypot},
- {"log", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) log},
- {"log10", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) log10},
- {"pow", 2, {TCL_DOUBLE, TCL_DOUBLE}, ExprBinaryFunc, (ClientData) pow},
- {"sin", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) sin},
- {"sinh", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) sinh},
- {"sqrt", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) sqrt},
- {"tan", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) tan},
- {"tanh", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) tanh},
- #endif
- {"abs", 1, {TCL_EITHER}, ExprAbsFunc, 0},
- {"double", 1, {TCL_EITHER}, ExprDoubleFunc, 0},
- {"int", 1, {TCL_EITHER}, ExprIntFunc, 0},
- {"rand", 0, {TCL_EITHER}, ExprRandFunc, 0}, /* NOTE: rand takes no args. */
- {"round", 1, {TCL_EITHER}, ExprRoundFunc, 0},
- {"srand", 1, {TCL_INT}, ExprSrandFunc, 0},
- {0},
- };
-
- /*
- * The structure below defines the command name Tcl object type by means of
- * procedures that can be invoked by generic object code. Objects of this
- * type cache the Command pointer that results from looking up command names
- * in the command hashtable. Such objects appear as the zeroth ("command
- * name") argument in a Tcl command.
- */
-
- Tcl_ObjType tclCmdNameType = {
- "cmdName", /* name */
- FreeCmdNameInternalRep, /* freeIntRepProc */
- DupCmdNameInternalRep, /* dupIntRepProc */
- UpdateStringOfCmdName, /* updateStringProc */
- SetCmdNameFromAny /* setFromAnyProc */
- };
-
- /*
- *----------------------------------------------------------------------
- *
- * InitByteCodeExecution --
- *
- * This procedure is called once to initialize the Tcl bytecode
- * interpreter.
- *
- * Results:
- * None.
- *
- * Side effects:
- * This procedure initializes the array of instruction names. If
- * compiling with the TCL_COMPILE_STATS flag, it initializes the
- * array that counts the executions of each instruction and it
- * creates the "evalstats" command. It also registers the command name
- * Tcl_ObjType. It also establishes the link between the Tcl
- * "tcl_traceExec" and C "tclTraceExec" variables.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- InitByteCodeExecution(interp)
- Tcl_Interp *interp; /* Interpreter for which the Tcl variable
- * "tcl_traceExec" is linked to control
- * instruction tracing. */
- {
- int i;
-
- Tcl_RegisterObjType(&tclCmdNameType);
-
- (VOID *) memset(opName, 0, sizeof(opName));
- for (i = 0; instructionTable[i].name != NULL; i++) {
- opName[i] = instructionTable[i].name;
- }
-
- #ifdef TCL_COMPILE_STATS
- (VOID *) memset(instructionCount, 0, sizeof(instructionCount));
- (VOID *) memset(tclByteCodeCount, 0, sizeof(tclByteCodeCount));
- (VOID *) memset(tclSourceCount, 0, sizeof(tclSourceCount));
-
- Tcl_CreateCommand(interp, "evalstats", EvalStatsCmd,
- (ClientData) NULL, (Tcl_CmdDeleteProc *) NULL);
- #endif /* TCL_COMPILE_STATS */
-
- if (Tcl_LinkVar(interp, "tcl_traceExec", (char *) &tclTraceExec,
- TCL_LINK_INT) != TCL_OK) {
- panic("InitByteCodeExecution: can't create link for tcl_traceExec variable");
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TclCreateExecEnv --
- *
- * This procedure creates a new execution environment for Tcl bytecode
- * execution. An ExecEnv points to a Tcl evaluation stack. An ExecEnv
- * is typically created once for each Tcl interpreter (Interp
- * structure) and recursively passed to TclExecuteByteCode to execute
- * ByteCode sequences for nested commands.
- *
- * Results:
- * A newly allocated ExecEnv is returned. This points to an empty
- * evaluation stack of the standard initial size.
- *
- * Side effects:
- * The bytecode interpreter is also initialized here, as this
- * procedure will be called before any call to TclExecuteByteCode.
- *
- *----------------------------------------------------------------------
- */
-
- #define TCL_STACK_INITIAL_SIZE 2000
-
- ExecEnv *
- TclCreateExecEnv(interp)
- Tcl_Interp *interp; /* Interpreter for which the execution
- * environment is being created. */
- {
- ExecEnv *eePtr = (ExecEnv *) ckalloc(sizeof(ExecEnv));
-
- eePtr->stackPtr = (StackItem *)
- ckalloc((unsigned) (TCL_STACK_INITIAL_SIZE * sizeof(StackItem)));
- eePtr->stackTop = -1;
- eePtr->stackEnd = (TCL_STACK_INITIAL_SIZE - 1);
-
- if (!execInitialized) {
- InitByteCodeExecution(interp);
- execInitialized = 1;
- }
-
- return eePtr;
- }
- #undef TCL_STACK_INITIAL_SIZE
-
- /*
- *----------------------------------------------------------------------
- *
- * TclDeleteExecEnv --
- *
- * Frees the storage for an ExecEnv.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Storage for an ExecEnv and its contained storage (e.g. the
- * evaluation stack) is freed.
- *
- *----------------------------------------------------------------------
- */
-
- void
- TclDeleteExecEnv(eePtr)
- ExecEnv *eePtr; /* Execution environment to free. */
- {
- ckfree((char *) eePtr->stackPtr);
- ckfree((char *) eePtr);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TclFinalizeExecEnv --
- *
- * Finalizes the execution environment setup so that it can be
- * later reinitialized.
- *
- * Results:
- * None.
- *
- * Side effects:
- * After this call, the next time TclCreateExecEnv will be called
- * it will call InitByteCodeExecution.
- *
- *----------------------------------------------------------------------
- */
-
- void
- TclFinalizeExecEnv()
- {
- execInitialized = 0;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * GrowEvaluationStack --
- *
- * This procedure grows a Tcl evaluation stack stored in an ExecEnv.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The size of the evaluation stack is doubled.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- GrowEvaluationStack(eePtr)
- register ExecEnv *eePtr; /* Points to the ExecEnv with an evaluation
- * stack to enlarge. */
- {
- /*
- * The current Tcl stack elements are stored from eePtr->stackPtr[0]
- * to eePtr->stackPtr[eePtr->stackEnd] (inclusive).
- */
-
- int currElems = (eePtr->stackEnd + 1);
- int newElems = 2*currElems;
- int currBytes = currElems * sizeof(StackItem);
- int newBytes = 2*currBytes;
- StackItem *newStackPtr = (StackItem *) ckalloc((unsigned) newBytes);
-
- /*
- * Copy the existing stack items to the new stack space, free the old
- * storage if appropriate, and mark new space as malloc'ed.
- */
-
- memcpy((VOID *) newStackPtr, (VOID *) eePtr->stackPtr,
- (size_t) currBytes);
- ckfree((char *) eePtr->stackPtr);
- eePtr->stackPtr = newStackPtr;
- eePtr->stackEnd = (newElems - 1); /* i.e. index of last usable item */
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TclExecuteByteCode --
- *
- * This procedure executes the instructions of a ByteCode structure.
- * It returns when a "done" instruction is executed or an error occurs.
- *
- * Results:
- * The return value is one of the return codes defined in tcl.h
- * (such as TCL_OK), and interp->objResultPtr refers to a Tcl object
- * that either contains the result of executing the code or an
- * error message.
- *
- * Side effects:
- * Almost certainly, depending on the ByteCode's instructions.
- *
- *----------------------------------------------------------------------
- */
-
- int
- TclExecuteByteCode(interp, codePtr)
- Tcl_Interp *interp; /* Token for command interpreter. */
- ByteCode *codePtr; /* The bytecode sequence to interpret. */
- {
- Interp *iPtr = (Interp *) interp;
- ExecEnv *eePtr = iPtr->execEnvPtr;
- /* Points to the execution environment. */
- register StackItem *stackPtr = eePtr->stackPtr;
- /* Cached evaluation stack base pointer. */
- register int stackTop = eePtr->stackTop;
- /* Cached top index of evaluation stack. */
- Tcl_Obj **objArrayPtr = codePtr->objArrayPtr;
- /* Points to the ByteCode's object array. */
- unsigned char *pc = codePtr->codeStart;
- /* The current program counter. */
- unsigned char opCode; /* The current instruction code. */
- int opnd; /* Current instruction's operand byte. */
- int pcAdjustment; /* Hold pc adjustment after instruction. */
- int initStackTop = stackTop;/* Stack top at start of execution. */
- ExceptionRange *rangePtr; /* Points to closest loop or catch exception
- * range enclosing the pc. Used by various
- * instructions and processCatch to
- * process break, continue, and errors. */
- int result = TCL_OK; /* Return code returned after execution. */
- int traceInstructions = (tclTraceExec == 3);
- Tcl_Obj *valuePtr, *value2Ptr, *namePtr, *objPtr;
- char *bytes;
- int length;
- long i;
- Tcl_DString command; /* Used for debugging. If tclTraceExec >= 2
- * holds a string representing the last
- * command invoked. */
-
- /*
- * This procedure uses a stack to hold information about catch commands.
- * This information is the current operand stack top when starting to
- * execute the code for each catch command. It starts out with stack-
- * allocated space but uses dynamically-allocated storage if needed.
- */
-
- #define STATIC_CATCH_STACK_SIZE 5
- int (catchStackStorage[STATIC_CATCH_STACK_SIZE]);
- int *catchStackPtr = catchStackStorage;
- int catchTop = -1;
-
- /*
- * THIS PROC FAILS IF AN OBJECT'S STRING REP HAS A NULL BYTE.
- */
-
- if (tclTraceExec >= 2) {
- PrintByteCodeInfo(codePtr);
- #ifdef TCL_COMPILE_STATS
- fprintf(stdout, " Starting stack top=%d, system objects=%ld\n",
- eePtr->stackTop, (tclObjsAlloced - tclObjsFreed));
- #else
- fprintf(stdout, " Starting stack top=%d\n", eePtr->stackTop);
- #endif /* TCL_COMPILE_STATS */
- fflush(stdout);
- }
-
- #ifdef TCL_COMPILE_STATS
- numExecutions++;
- #endif /* TCL_COMPILE_STATS */
-
- /*
- * Make sure the catch stack is large enough to hold the maximum number
- * of catch commands that could ever be executing at the same time. This
- * will be no more than the exception range array's depth.
- */
-
- if (codePtr->maxExcRangeDepth > STATIC_CATCH_STACK_SIZE) {
- catchStackPtr = (int *)
- ckalloc(codePtr->maxExcRangeDepth * sizeof(int));
- }
-
- /*
- * Make sure the stack has enough room to execute this ByteCode.
- */
-
- while ((stackTop + codePtr->maxStackDepth) > eePtr->stackEnd) {
- GrowEvaluationStack(eePtr);
- stackPtr = eePtr->stackPtr;
- }
-
- /*
- * Initialize the buffer that holds a string containing the name and
- * arguments for the last invoked command.
- */
-
- Tcl_DStringInit(&command);
-
- /*
- * Loop executing instructions until a "done" instruction, a TCL_RETURN,
- * or some error.
- */
-
- for (;;) {
- #ifdef TCL_COMPILE_DEBUG
- ValidatePcAndStackTop(codePtr, pc, stackTop, initStackTop,
- eePtr->stackEnd);
- #else /* not TCL_COMPILE_DEBUG */
- if (traceInstructions) {
- #ifdef TCL_COMPILE_STATS
- fprintf(stdout, "%d: %d,%ld ", iPtr->numLevels, stackTop,
- (tclObjsAlloced - tclObjsFreed));
- #else /* TCL_COMPILE_STATS */
- fprintf(stdout, "%d: %d ", iPtr->numLevels, stackTop);
- #endif /* TCL_COMPILE_STATS */
- TclPrintInstruction(codePtr, pc);
- fflush(stdout);
- }
- #endif /* TCL_COMPILE_DEBUG */
-
- opCode = *pc;
- #ifdef TCL_COMPILE_STATS
- instructionCount[opCode]++;
- #endif /* TCL_COMPILE_STATS */
-
- switch (opCode) {
- case INST_DONE:
- /*
- * Pop the topmost object from the stack, set the interpreter's
- * object result to point to it, and return.
- */
- valuePtr = POP_OBJECT();
- Tcl_SetObjResult(interp, valuePtr);
- TclDecrRefCount(valuePtr);
- if (stackTop != initStackTop) {
- fprintf(stderr, "\nTclExecuteByteCode: done instruction at pc %u: stack top %d != entry stack top %d\n",
- (unsigned int)(pc - codePtr->codeStart),
- (unsigned int) stackTop,
- (unsigned int) initStackTop);
- fprintf(stderr, " Source: ");
- TclPrintSource(stderr, codePtr->source, 150);
- panic("TclExecuteByteCode execution failure: end stack top != start stack top");
- }
- TRACE_WITH_OBJ(("done => return code=%d, result is ", result),
- iPtr->objResultPtr);
- goto done;
-
- case INST_PUSH1:
- valuePtr = objArrayPtr[TclGetUInt1AtPtr(pc+1)];
- PUSH_OBJECT(valuePtr);
- TRACE_WITH_OBJ(("push1 %u => ", TclGetUInt1AtPtr(pc+1)),
- valuePtr);
- ADJUST_PC(2);
-
- case INST_PUSH4:
- valuePtr = objArrayPtr[TclGetUInt4AtPtr(pc+1)];
- PUSH_OBJECT(valuePtr);
- TRACE_WITH_OBJ(("push4 %u => ", TclGetUInt4AtPtr(pc+1)),
- valuePtr);
- ADJUST_PC(5);
-
- case INST_POP:
- valuePtr = POP_OBJECT();
- TRACE_WITH_OBJ(("pop => discarding "), valuePtr);
- TclDecrRefCount(valuePtr); /* finished with pop'ed object. */
- ADJUST_PC(1);
-
- case INST_DUP:
- valuePtr = stackPtr[stackTop].o;
- PUSH_OBJECT(Tcl_DuplicateObj(valuePtr));
- TRACE_WITH_OBJ(("dup => "), valuePtr);
- ADJUST_PC(1);
-
- case INST_CONCAT1:
- opnd = TclGetUInt1AtPtr(pc+1);
- {
- Tcl_Obj *concatObjPtr;
- int totalLen = 0;
-
- /*
- * Concatenate strings (with no separators) from the top
- * opnd items on the stack starting with the deepest item.
- * First, determine how many characters are needed.
- */
-
- for (i = (stackTop - (opnd-1)); i <= stackTop; i++) {
- valuePtr = stackPtr[i].o;
- bytes = TclGetStringFromObj(valuePtr, &length);
- if (bytes != NULL) {
- totalLen += length;
- }
- }
-
- /*
- * Initialize the new append string object by appending the
- * strings of the opnd stack objects. Also pop the objects.
- */
-
- TclNewObj(concatObjPtr);
- if (totalLen > 0) {
- char *p = (char *) ckalloc((unsigned) (totalLen + 1));
- concatObjPtr->bytes = p;
- concatObjPtr->length = totalLen;
- for (i = (stackTop - (opnd-1)); i <= stackTop; i++) {
- valuePtr = stackPtr[i].o;
- bytes = TclGetStringFromObj(valuePtr, &length);
- if (bytes != NULL) {
- memcpy((VOID *) p, (VOID *) bytes,
- (size_t) length);
- p += length;
- }
- TclDecrRefCount(valuePtr);
- }
- *p = '\0';
- } else {
- for (i = (stackTop - (opnd-1)); i <= stackTop; i++) {
- valuePtr = stackPtr[i].o;
- Tcl_DecrRefCount(valuePtr);
- }
- }
- stackTop -= opnd;
-
- PUSH_OBJECT(concatObjPtr);
- TRACE_WITH_OBJ(("concat %u => ", opnd), concatObjPtr);
- ADJUST_PC(2);
- }
-
- case INST_INVOKE_STK4:
- opnd = TclGetUInt4AtPtr(pc+1);
- pcAdjustment = 5;
- goto doInvocation;
-
- case INST_INVOKE_STK1:
- opnd = TclGetUInt1AtPtr(pc+1);
- pcAdjustment = 2;
-
- doInvocation:
- {
- char *cmdName;
- Command *cmdPtr; /* Points to command's Command struct. */
- int objc = opnd; /* The number of arguments. */
- Tcl_Obj **objv; /* The array of argument objects. */
- Tcl_Obj *objv0Ptr; /* Holds objv[0], the command name. */
- int newPcOffset = 0;
- /* Instruction offset computed during
- * break, continue, error processing.
- * Init. to avoid compiler warning. */
- Trace *tracePtr;
- Tcl_Command cmd;
- #ifdef TCL_COMPILE_DEBUG
- int isUnknownCmd = 0;
- char cmdNameBuf[30];
- #endif /* TCL_COMPILE_DEBUG */
-
- /*
- * If the interpreter was deleted, return an error.
- */
-
- if (iPtr->flags & DELETED) {
- Tcl_ResetResult(interp);
- Tcl_AppendToObj(Tcl_GetObjResult(interp),
- "attempt to call eval in deleted interpreter", -1);
- Tcl_SetErrorCode(interp, "CORE", "IDELETE",
- "attempt to call eval in deleted interpreter",
- (char *) NULL);
- result = TCL_ERROR;
- goto checkForCatch;
- }
-
- objv = &(stackPtr[stackTop - (objc-1)].o);
- objv0Ptr = objv[0];
- cmdName = TclGetStringFromObj(objv0Ptr, (int *) NULL);
-
- /*
- * Find the procedure to execute this command. If there
- * isn't one, then see if there is a command "unknown". If
- * so, invoke it, passing it the original command words as
- * arguments.
- *
- * We convert the objv[0] object to be a CmdName object.
- * This caches a pointer to the Command structure for the
- * command; this pointer is held in a ResolvedCmdName
- * structure the object's internal rep. points to.
- */
-
- cmd = Tcl_GetCommandFromObj(interp, objv0Ptr);
- cmdPtr = (Command *) cmd;
-
- /*
- * If the command is still not found, handle it with the
- * "unknown" proc.
- */
-
- if (cmdPtr == NULL) {
- cmd = Tcl_FindCommand(interp, "unknown",
- (Tcl_Namespace *) NULL, /*flags*/ TCL_GLOBAL_ONLY);
- if (cmd == (Tcl_Command) NULL) {
- Tcl_ResetResult(interp);
- Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
- "invalid command name \"", cmdName, "\"",
- (char *) NULL);
- TRACE(("%s %u => unknown proc not found: ",
- opName[opCode], objc));
- result = TCL_ERROR;
- goto checkForCatch;
- }
- cmdPtr = (Command *) cmd;
- #ifdef TCL_COMPILE_DEBUG
- isUnknownCmd = 1;
- #endif /*TCL_COMPILE_DEBUG*/
- stackTop++; /* need room for new inserted objv[0] */
- for (i = objc; i >= 0; i--) {
- objv[i+1] = objv[i];
- }
- objc++;
- objv[0] = Tcl_NewStringObj("unknown", -1);
- Tcl_IncrRefCount(objv[0]);
- }
-
- /*
- * Call any trace procedures.
- */
-
- for (tracePtr = iPtr->tracePtr; tracePtr != NULL;
- tracePtr = tracePtr->nextPtr) {
- if (iPtr->numLevels <= tracePtr->level) {
- int numChars;
- char *cmd = GetSrcInfoForPc(pc, codePtr, &numChars);
- if (cmd != NULL) {
- DECACHE_STACK_INFO();
- CallTraceProcedure(interp, tracePtr, cmdPtr,
- cmd, numChars, objc, objv);
- CACHE_STACK_INFO();
- }
- }
- }
-
- /*
- * Finally, invoke the command's Tcl_ObjCmdProc. First reset
- * the interpreter's string and object results to their
- * default empty values since they could have gotten changed
- * by earlier invocations.
- */
-
- Tcl_ResetResult(interp);
-
- if (tclTraceExec >= 2) {
- char buffer[50];
-
- sprintf(buffer, "%d: (%u) invoking ", iPtr->numLevels,
- (unsigned int)(pc - codePtr->codeStart));
- Tcl_DStringAppend(&command, buffer, -1);
-
- #ifdef TCL_COMPILE_DEBUG
- if (traceInstructions) { /* tclTraceExec == 3 */
- strncpy(cmdNameBuf, cmdName, 20);
- TRACE(("%s %u => call ", opName[opCode],
- (isUnknownCmd? objc-1 : objc)));
- } else {
- fprintf(stdout, "%s", buffer);
- }
- #else /* TCL_COMPILE_DEBUG */
- fprintf(stdout, "%s", buffer);
- #endif /*TCL_COMPILE_DEBUG*/
-
- for (i = 0; i < objc; i++) {
- bytes = TclGetStringFromObj(objv[i], &length);
- TclPrintSource(stdout, bytes, TclMin(length, 15));
- fprintf(stdout, " ");
-
- sprintf(buffer, "\"%.*s\" ", TclMin(length, 15), bytes);
- Tcl_DStringAppend(&command, buffer, -1);
- }
- fprintf(stdout, "\n");
- fflush(stdout);
-
- Tcl_DStringFree(&command);
- }
-
- iPtr->cmdCount++;
- DECACHE_STACK_INFO();
- result = (*cmdPtr->objProc)(cmdPtr->objClientData, interp,
- objc, objv);
- if (Tcl_AsyncReady()) {
- result = Tcl_AsyncInvoke(interp, result);
- }
- CACHE_STACK_INFO();
-
- /*
- * If the interpreter has a non-empty string result, the
- * result object is either empty or stale because some
- * procedure set interp->result directly. If so, move the
- * string result to the result object, then reset the
- * string result.
- */
-
- if (*(iPtr->result) != 0) {
- (void) Tcl_GetObjResult(interp);
- }
-
- /*
- * Pop the objc top stack elements and decrement their ref
- * counts.
- */
-
- i = (stackTop - (objc-1));
- while (i <= stackTop) {
- valuePtr = stackPtr[i].o;
- TclDecrRefCount(valuePtr);
- i++;
- }
- stackTop -= objc;
-
- /*
- * Process the result of the Tcl_ObjCmdProc call.
- */
-
- switch (result) {
- case TCL_OK:
- /*
- * Push the call's object result and continue execution
- * with the next instruction.
- */
- PUSH_OBJECT(Tcl_GetObjResult(interp));
- TRACE_WITH_OBJ(("%s %u => ...after \"%.20s\", result=",
- opName[opCode], objc, cmdNameBuf),
- Tcl_GetObjResult(interp));
- ADJUST_PC(pcAdjustment);
-
- case TCL_BREAK:
- case TCL_CONTINUE:
- /*
- * The invoked command requested a break or continue.
- * Find the closest enclosing loop or catch exception
- * range, if any. If a loop is found, terminate its
- * execution or skip to its next iteration. If the
- * closest is a catch exception range, jump to its
- * catchOffset. If no enclosing range is found, stop
- * execution and return the TCL_BREAK or TCL_CONTINUE.
- */
- rangePtr = TclGetExceptionRangeForPc(pc,
- /*catchOnly*/ 0, codePtr);
- if (rangePtr == NULL) {
- TRACE(("%s %u => ... after \"%.20s\", no encl. loop or catch, returning %s\n",
- opName[opCode], objc, cmdNameBuf,
- StringForResultCode(result)));
- goto abnormalReturn; /* no catch exists to check */
- }
- switch (rangePtr->type) {
- case LOOP_EXCEPTION_RANGE:
- if (result == TCL_BREAK) {
- newPcOffset = rangePtr->breakOffset;
- } else if (rangePtr->continueOffset == -1) {
- TRACE(("%s %u => ... after \"%.20s\", %s, loop w/o continue, checking for catch\n",
- opName[opCode], objc, cmdNameBuf,
- StringForResultCode(result)));
- goto checkForCatch;
- } else {
- newPcOffset = rangePtr->continueOffset;
- }
- TRACE(("%s %u => ... after \"%.20s\", %s, range at %d, new pc %d\n",
- opName[opCode], objc, cmdNameBuf,
- StringForResultCode(result),
- rangePtr->codeOffset, newPcOffset));
- break;
- case CATCH_EXCEPTION_RANGE:
- TRACE(("%s %u => ... after \"%.20s\", %s...\n",
- opName[opCode], objc, cmdNameBuf,
- StringForResultCode(result)));
- goto processCatch; /* it will use rangePtr */
- default:
- panic("TclExecuteByteCode: unrecognized ExceptionRange type %d\n", rangePtr->type);
- }
- result = TCL_OK;
- pc = (codePtr->codeStart + newPcOffset);
- continue; /* restart outer instruction loop at pc */
-
- case TCL_ERROR:
- /*
- * The invoked command returned an error. Look for an
- * enclosing catch exception range, if any.
- */
- TRACE_WITH_OBJ(("%s %u => ... after \"%.20s\", TCL_ERROR ",
- opName[opCode], objc, cmdNameBuf),
- Tcl_GetObjResult(interp));
- goto checkForCatch;
-
- case TCL_RETURN:
- /*
- * The invoked command requested that the current
- * procedure stop execution and return. First check
- * for an enclosing catch exception range, if any.
- */
- TRACE(("%s %u => ... after \"%.20s\", TCL_RETURN\n",
- opName[opCode], objc, cmdNameBuf));
- goto checkForCatch;
-
- default:
- TRACE_WITH_OBJ(("%s %u => ... after \"%.20s\", OTHER RETURN CODE %d ",
- opName[opCode], objc, cmdNameBuf, result),
- Tcl_GetObjResult(interp));
- goto checkForCatch;
- } /* end of switch on result from invoke instruction */
- }
-
- case INST_EVAL_STK:
- objPtr = POP_OBJECT();
- DECACHE_STACK_INFO();
- result = Tcl_EvalObj(interp, objPtr);
- CACHE_STACK_INFO();
- if (result == TCL_OK) {
- /*
- * Normal return; push the eval's object result.
- */
-
- PUSH_OBJECT(Tcl_GetObjResult(interp));
- TRACE_WITH_OBJ(("evalStk \"%.30s\" => ", O2S(objPtr)),
- Tcl_GetObjResult(interp));
- TclDecrRefCount(objPtr);
- ADJUST_PC(1);
- } else if ((result == TCL_BREAK) || (result == TCL_CONTINUE)) {
- /*
- * Find the closest enclosing loop or catch exception range,
- * if any. If a loop is found, terminate its execution or
- * skip to its next iteration. If the closest is a catch
- * exception range, jump to its catchOffset. If no enclosing
- * range is found, stop execution and return that same
- * TCL_BREAK or TCL_CONTINUE.
- */
-
- int newPcOffset = 0; /* Pc offset computed during break,
- * continue, error processing. Init.
- * to avoid compiler warning. */
-
- rangePtr = TclGetExceptionRangeForPc(pc, /*catchOnly*/ 0,
- codePtr);
- if (rangePtr == NULL) {
- TRACE(("evalStk \"%.30s\" => no encl. loop or catch, returning %s\n",
- O2S(objPtr), StringForResultCode(result)));
- Tcl_DecrRefCount(objPtr);
- goto abnormalReturn; /* no catch exists to check */
- }
- switch (rangePtr->type) {
- case LOOP_EXCEPTION_RANGE:
- if (result == TCL_BREAK) {
- newPcOffset = rangePtr->breakOffset;
- } else if (rangePtr->continueOffset == -1) {
- TRACE(("evalStk \"%.30s\" => %s, loop w/o continue, checking for catch\n",
- O2S(objPtr), StringForResultCode(result)));
- Tcl_DecrRefCount(objPtr);
- goto checkForCatch;
- } else {
- newPcOffset = rangePtr->continueOffset;
- }
- result = TCL_OK;
- TRACE_WITH_OBJ(("evalStk \"%.30s\" => %s, range at %d, new pc %d ",
- O2S(objPtr), StringForResultCode(result),
- rangePtr->codeOffset, newPcOffset), valuePtr);
- break;
- case CATCH_EXCEPTION_RANGE:
- TRACE_WITH_OBJ(("evalStk \"%.30s\" => %s ",
- O2S(objPtr), StringForResultCode(result)),
- valuePtr);
- Tcl_DecrRefCount(objPtr);
- goto processCatch; /* it will use rangePtr */
- default:
- panic("TclExecuteByteCode: unrecognized ExceptionRange type %d\n", rangePtr->type);
- }
- Tcl_DecrRefCount(objPtr);
- pc = (codePtr->codeStart + newPcOffset);
- continue; /* restart outer instruction loop at pc */
- } else { /* eval returned TCL_ERROR, TCL_RETURN, unknown code */
- TRACE_WITH_OBJ(("evalStk \"%.30s\" => ERROR: ", O2S(objPtr)),
- Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(objPtr);
- goto checkForCatch;
- }
-
- case INST_EXPR_STK:
- objPtr = POP_OBJECT();
- Tcl_ResetResult(interp);
- DECACHE_STACK_INFO();
- result = Tcl_ExprObj(interp, objPtr, &valuePtr);
- CACHE_STACK_INFO();
- if (result != TCL_OK) {
- TRACE_WITH_OBJ(("exprStk \"%.30s\" => ERROR: ",
- O2S(objPtr)), Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(objPtr);
- goto checkForCatch;
- }
- stackPtr[++stackTop].o = valuePtr; /* already has right refct */
- TRACE_WITH_OBJ(("exprStk \"%.30s\" => ", O2S(objPtr)), valuePtr);
- TclDecrRefCount(objPtr);
- ADJUST_PC(1);
-
- case INST_LOAD_SCALAR4:
- opnd = TclGetInt4AtPtr(pc+1);
- pcAdjustment = 5;
- goto doLoadScalar;
-
- case INST_LOAD_SCALAR1:
- opnd = TclGetUInt1AtPtr(pc+1);
- pcAdjustment = 2;
-
- doLoadScalar:
- DECACHE_STACK_INFO();
- valuePtr = TclGetIndexedScalar(interp, opnd,
- /*leaveErrorMsg*/ 1);
- CACHE_STACK_INFO();
- if (valuePtr == NULL) {
- TRACE_WITH_OBJ(("%s %u => ERROR: ", opName[opCode], opnd),
- Tcl_GetObjResult(interp));
- result = TCL_ERROR;
- goto checkForCatch;
- }
- PUSH_OBJECT(valuePtr);
- TRACE_WITH_OBJ(("%s %u => ", opName[opCode], opnd), valuePtr);
- ADJUST_PC(pcAdjustment);
-
- case INST_LOAD_SCALAR_STK:
- namePtr = POP_OBJECT();
- DECACHE_STACK_INFO();
- valuePtr = Tcl_ObjGetVar2(interp, namePtr, (Tcl_Obj *) NULL,
- TCL_LEAVE_ERR_MSG);
- CACHE_STACK_INFO();
- if (valuePtr == NULL) {
- TRACE_WITH_OBJ(("loadScalarStk \"%.30s\" => ERROR: ",
- O2S(namePtr)), Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(namePtr);
- result = TCL_ERROR;
- goto checkForCatch;
- }
- PUSH_OBJECT(valuePtr);
- TRACE_WITH_OBJ(("loadScalarStk \"%.30s\" => ",
- O2S(namePtr)), valuePtr);
- TclDecrRefCount(namePtr);
- ADJUST_PC(1);
-
- case INST_LOAD_ARRAY4:
- opnd = TclGetUInt4AtPtr(pc+1);
- pcAdjustment = 5;
- goto doLoadArray;
-
- case INST_LOAD_ARRAY1:
- opnd = TclGetUInt1AtPtr(pc+1);
- pcAdjustment = 2;
-
- doLoadArray:
- {
- Tcl_Obj *elemPtr = POP_OBJECT();
-
- DECACHE_STACK_INFO();
- valuePtr = TclGetElementOfIndexedArray(interp, opnd,
- elemPtr, /*leaveErrorMsg*/ 1);
- CACHE_STACK_INFO();
- if (valuePtr == NULL) {
- TRACE_WITH_OBJ(("%s %u \"%.30s\" => ERROR: ",
- opName[opCode], opnd, O2S(elemPtr)),
- Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(elemPtr);
- result = TCL_ERROR;
- goto checkForCatch;
- }
- PUSH_OBJECT(valuePtr);
- TRACE_WITH_OBJ(("%s %u \"%.30s\" => ",
- opName[opCode], opnd, O2S(elemPtr)), valuePtr);
- TclDecrRefCount(elemPtr);
- }
- ADJUST_PC(pcAdjustment);
-
- case INST_LOAD_ARRAY_STK:
- {
- Tcl_Obj *elemPtr = POP_OBJECT();
-
- namePtr = POP_OBJECT();
- DECACHE_STACK_INFO();
- valuePtr = Tcl_ObjGetVar2(interp, namePtr, elemPtr,
- TCL_LEAVE_ERR_MSG);
- CACHE_STACK_INFO();
- if (valuePtr == NULL) {
- TRACE_WITH_OBJ(("loadArrayStk \"%.30s(%.30s)\" => ERROR: ",
- O2S(namePtr), O2S(elemPtr)),
- Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(namePtr);
- Tcl_DecrRefCount(elemPtr);
- result = TCL_ERROR;
- goto checkForCatch;
- }
- PUSH_OBJECT(valuePtr);
- TRACE_WITH_OBJ(("loadArrayStk \"%.30s(%.30s)\" => ",
- O2S(namePtr), O2S(elemPtr)), valuePtr);
- TclDecrRefCount(namePtr);
- TclDecrRefCount(elemPtr);
- }
- ADJUST_PC(1);
-
- case INST_LOAD_STK:
- namePtr = POP_OBJECT();
- DECACHE_STACK_INFO();
- valuePtr = Tcl_ObjGetVar2(interp, namePtr, NULL,
- TCL_PARSE_PART1|TCL_LEAVE_ERR_MSG);
- CACHE_STACK_INFO();
- if (valuePtr == NULL) {
- TRACE_WITH_OBJ(("loadStk \"%.30s\" => ERROR: ",
- O2S(namePtr)), Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(namePtr);
- result = TCL_ERROR;
- goto checkForCatch;
- }
- PUSH_OBJECT(valuePtr);
- TRACE_WITH_OBJ(("loadStk \"%.30s\" => ", O2S(namePtr)),
- valuePtr);
- TclDecrRefCount(namePtr);
- ADJUST_PC(1);
-
- case INST_STORE_SCALAR4:
- opnd = TclGetUInt4AtPtr(pc+1);
- pcAdjustment = 5;
- goto doStoreScalar;
-
- case INST_STORE_SCALAR1:
- opnd = TclGetUInt1AtPtr(pc+1);
- pcAdjustment = 2;
-
- doStoreScalar:
- valuePtr = POP_OBJECT();
- DECACHE_STACK_INFO();
- value2Ptr = TclSetIndexedScalar(interp, opnd, valuePtr,
- /*leaveErrorMsg*/ 1);
- CACHE_STACK_INFO();
- if (value2Ptr == NULL) {
- TRACE_WITH_OBJ(("%s %u <- \"%.30s\" => ERROR: ",
- opName[opCode], opnd, O2S(valuePtr)),
- Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(valuePtr);
- result = TCL_ERROR;
- goto checkForCatch;
- }
- PUSH_OBJECT(value2Ptr);
- TRACE_WITH_OBJ(("%s %u <- \"%.30s\" => ",
- opName[opCode], opnd, O2S(valuePtr)), value2Ptr);
- TclDecrRefCount(valuePtr);
- ADJUST_PC(pcAdjustment);
-
- case INST_STORE_SCALAR_STK:
- valuePtr = POP_OBJECT();
- namePtr = POP_OBJECT();
- DECACHE_STACK_INFO();
- value2Ptr = Tcl_ObjSetVar2(interp, namePtr, NULL, valuePtr,
- TCL_LEAVE_ERR_MSG);
- CACHE_STACK_INFO();
- if (value2Ptr == NULL) {
- TRACE_WITH_OBJ(
- ("storeScalarStk \"%.30s\" <- \"%.30s\" => ERROR: ",
- O2S(namePtr), O2S(valuePtr)),
- Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(namePtr);
- Tcl_DecrRefCount(valuePtr);
- result = TCL_ERROR;
- goto checkForCatch;
- }
- PUSH_OBJECT(value2Ptr);
- TRACE_WITH_OBJ(
- ("storeScalarStk \"%.30s\" <- \"%.30s\" => ",
- O2S(namePtr),
- O2S(valuePtr)),
- value2Ptr);
- TclDecrRefCount(namePtr);
- TclDecrRefCount(valuePtr);
- ADJUST_PC(1);
-
- case INST_STORE_ARRAY4:
- opnd = TclGetUInt4AtPtr(pc+1);
- pcAdjustment = 5;
- goto doStoreArray;
-
- case INST_STORE_ARRAY1:
- opnd = TclGetUInt1AtPtr(pc+1);
- pcAdjustment = 2;
-
- doStoreArray:
- {
- Tcl_Obj *elemPtr;
-
- valuePtr = POP_OBJECT();
- elemPtr = POP_OBJECT();
- DECACHE_STACK_INFO();
- value2Ptr = TclSetElementOfIndexedArray(interp, opnd,
- elemPtr, valuePtr, TCL_LEAVE_ERR_MSG);
- CACHE_STACK_INFO();
- if (value2Ptr == NULL) {
- TRACE_WITH_OBJ(
- ("%s %u \"%.30s\" <- \"%.30s\" => ERROR: ",
- opName[opCode], opnd, O2S(elemPtr),
- O2S(valuePtr)), Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(elemPtr);
- Tcl_DecrRefCount(valuePtr);
- result = TCL_ERROR;
- goto checkForCatch;
- }
- PUSH_OBJECT(value2Ptr);
- TRACE_WITH_OBJ(("%s %u \"%.30s\" <- \"%.30s\" => ",
- opName[opCode], opnd, O2S(elemPtr), O2S(valuePtr)),
- value2Ptr);
- TclDecrRefCount(elemPtr);
- TclDecrRefCount(valuePtr);
- }
- ADJUST_PC(pcAdjustment);
-
- case INST_STORE_ARRAY_STK:
- {
- Tcl_Obj *elemPtr;
-
- valuePtr = POP_OBJECT();
- elemPtr = POP_OBJECT();
- namePtr = POP_OBJECT();
- DECACHE_STACK_INFO();
- value2Ptr = Tcl_ObjSetVar2(interp, namePtr, elemPtr,
- valuePtr, TCL_LEAVE_ERR_MSG);
- CACHE_STACK_INFO();
- if (value2Ptr == NULL) {
- TRACE_WITH_OBJ(("storeArrayStk \"%.30s(%.30s)\" <- \"%.30s\" => ERROR: ",
- O2S(namePtr), O2S(elemPtr), O2S(valuePtr)),
- Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(namePtr);
- Tcl_DecrRefCount(elemPtr);
- Tcl_DecrRefCount(valuePtr);
- result = TCL_ERROR;
- goto checkForCatch;
- }
- PUSH_OBJECT(value2Ptr);
- TRACE_WITH_OBJ(("storeArrayStk \"%.30s(%.30s)\" <- \"%.30s\" => ",
- O2S(namePtr), O2S(elemPtr), O2S(valuePtr)),
- value2Ptr);
- TclDecrRefCount(namePtr);
- TclDecrRefCount(elemPtr);
- TclDecrRefCount(valuePtr);
- }
- ADJUST_PC(1);
-
- case INST_STORE_STK:
- valuePtr = POP_OBJECT();
- namePtr = POP_OBJECT();
- DECACHE_STACK_INFO();
- value2Ptr = Tcl_ObjSetVar2(interp, namePtr, NULL, valuePtr,
- TCL_PARSE_PART1|TCL_LEAVE_ERR_MSG);
- CACHE_STACK_INFO();
- if (value2Ptr == NULL) {
- TRACE_WITH_OBJ(("storeStk \"%.30s\" <- \"%.30s\" => ERROR: ",
- O2S(namePtr), O2S(valuePtr)),
- Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(namePtr);
- Tcl_DecrRefCount(valuePtr);
- result = TCL_ERROR;
- goto checkForCatch;
- }
- PUSH_OBJECT(value2Ptr);
- TRACE_WITH_OBJ(("storeStk \"%.30s\" <- \"%.30s\" => ",
- O2S(namePtr), O2S(valuePtr)), value2Ptr);
- TclDecrRefCount(namePtr);
- TclDecrRefCount(valuePtr);
- ADJUST_PC(1);
-
- case INST_INCR_SCALAR1:
- opnd = TclGetUInt1AtPtr(pc+1);
- valuePtr = POP_OBJECT();
- if (valuePtr->typePtr != &tclIntType) {
- result = tclIntType.setFromAnyProc(interp, valuePtr);
- if (result != TCL_OK) {
- TRACE_WITH_OBJ(("incrScalar1 %u (by %s) => ERROR converting increment amount to int: ",
- opnd, O2S(valuePtr)), Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(valuePtr);
- goto checkForCatch;
- }
- }
- i = valuePtr->internalRep.longValue;
- DECACHE_STACK_INFO();
- value2Ptr = TclIncrIndexedScalar(interp, opnd, i);
- CACHE_STACK_INFO();
- if (value2Ptr == NULL) {
- TRACE_WITH_OBJ(("incrScalar1 %u (by %ld) => ERROR: ",
- opnd, i), Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(valuePtr);
- result = TCL_ERROR;
- goto checkForCatch;
- }
- PUSH_OBJECT(value2Ptr);
- TRACE_WITH_OBJ(("incrScalar1 %u (by %ld) => ", opnd, i),
- value2Ptr);
- TclDecrRefCount(valuePtr);
- ADJUST_PC(2);
-
- case INST_INCR_SCALAR_STK:
- case INST_INCR_STK:
- valuePtr = POP_OBJECT();
- namePtr = POP_OBJECT();
- if (valuePtr->typePtr != &tclIntType) {
- result = tclIntType.setFromAnyProc(interp, valuePtr);
- if (result != TCL_OK) {
- TRACE_WITH_OBJ(("%s \"%.30s\" (by %s) => ERROR converting increment amount to int: ",
- opName[opCode], O2S(namePtr), O2S(valuePtr)),
- Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(namePtr);
- Tcl_DecrRefCount(valuePtr);
- goto checkForCatch;
- }
- }
- i = valuePtr->internalRep.longValue;
- DECACHE_STACK_INFO();
- value2Ptr = TclIncrVar2(interp, namePtr, (Tcl_Obj *) NULL, i,
- /*part1NotParsed*/ (opCode == INST_INCR_STK));
- CACHE_STACK_INFO();
- if (value2Ptr == NULL) {
- TRACE_WITH_OBJ(("%s \"%.30s\" (by %ld) => ERROR: ",
- opName[opCode], O2S(namePtr), i),
- Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(namePtr);
- Tcl_DecrRefCount(valuePtr);
- result = TCL_ERROR;
- goto checkForCatch;
- }
- PUSH_OBJECT(value2Ptr);
- TRACE_WITH_OBJ(("%s \"%.30s\" (by %ld) => ",
- opName[opCode], O2S(namePtr), i), value2Ptr);
- Tcl_DecrRefCount(namePtr);
- Tcl_DecrRefCount(valuePtr);
- ADJUST_PC(1);
-
- case INST_INCR_ARRAY1:
- {
- Tcl_Obj *elemPtr;
-
- opnd = TclGetUInt1AtPtr(pc+1);
- valuePtr = POP_OBJECT();
- elemPtr = POP_OBJECT();
- if (valuePtr->typePtr != &tclIntType) {
- result = tclIntType.setFromAnyProc(interp, valuePtr);
- if (result != TCL_OK) {
- TRACE_WITH_OBJ(("incrArray1 %u \"%.30s\" (by %s) => ERROR converting increment amount to int: ",
- opnd, O2S(elemPtr), O2S(valuePtr)),
- Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(elemPtr);
- Tcl_DecrRefCount(valuePtr);
- goto checkForCatch;
- }
- }
- i = valuePtr->internalRep.longValue;
- DECACHE_STACK_INFO();
- value2Ptr = TclIncrElementOfIndexedArray(interp, opnd,
- elemPtr, i);
- CACHE_STACK_INFO();
- if (value2Ptr == NULL) {
- TRACE_WITH_OBJ(("incrArray1 %u \"%.30s\" (by %ld) => ERROR: ",
- opnd, O2S(elemPtr), i),
- Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(elemPtr);
- Tcl_DecrRefCount(valuePtr);
- result = TCL_ERROR;
- goto checkForCatch;
- }
- PUSH_OBJECT(value2Ptr);
- TRACE_WITH_OBJ(("incrArray1 %u \"%.30s\" (by %ld) => ",
- opnd, O2S(elemPtr), i), value2Ptr);
- Tcl_DecrRefCount(elemPtr);
- Tcl_DecrRefCount(valuePtr);
- }
- ADJUST_PC(2);
-
- case INST_INCR_ARRAY_STK:
- {
- Tcl_Obj *elemPtr;
-
- valuePtr = POP_OBJECT();
- elemPtr = POP_OBJECT();
- namePtr = POP_OBJECT();
- if (valuePtr->typePtr != &tclIntType) {
- result = tclIntType.setFromAnyProc(interp, valuePtr);
- if (result != TCL_OK) {
- TRACE_WITH_OBJ(("incrArrayStk \"%.30s(%.30s)\" (by %s) => ERROR converting increment amount to int: ",
- O2S(namePtr), O2S(elemPtr), O2S(valuePtr)),
- Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(namePtr);
- Tcl_DecrRefCount(elemPtr);
- Tcl_DecrRefCount(valuePtr);
- goto checkForCatch;
- }
- }
- i = valuePtr->internalRep.longValue;
- DECACHE_STACK_INFO();
- value2Ptr = TclIncrVar2(interp, namePtr, elemPtr, i,
- /*part1NotParsed*/ 0);
- CACHE_STACK_INFO();
- if (value2Ptr == NULL) {
- TRACE_WITH_OBJ(("incrArrayStk \"%.30s(%.30s)\" (by %ld) => ERROR: ",
- O2S(namePtr), O2S(elemPtr), i),
- Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(namePtr);
- Tcl_DecrRefCount(elemPtr);
- Tcl_DecrRefCount(valuePtr);
- result = TCL_ERROR;
- goto checkForCatch;
- }
- PUSH_OBJECT(value2Ptr);
- TRACE_WITH_OBJ(("incrArrayStk \"%.30s(%.30s)\" (by %ld) => ",
- O2S(namePtr), O2S(elemPtr), i), value2Ptr);
- Tcl_DecrRefCount(namePtr);
- Tcl_DecrRefCount(elemPtr);
- Tcl_DecrRefCount(valuePtr);
- }
- ADJUST_PC(1);
-
- case INST_INCR_SCALAR1_IMM:
- opnd = TclGetUInt1AtPtr(pc+1);
- i = TclGetInt1AtPtr(pc+2);
- DECACHE_STACK_INFO();
- value2Ptr = TclIncrIndexedScalar(interp, opnd, i);
- CACHE_STACK_INFO();
- if (value2Ptr == NULL) {
- TRACE_WITH_OBJ(("incrScalar1Imm %u %ld => ERROR: ",
- opnd, i), Tcl_GetObjResult(interp));
- result = TCL_ERROR;
- goto checkForCatch;
- }
- PUSH_OBJECT(value2Ptr);
- TRACE_WITH_OBJ(("incrScalar1Imm %u %ld => ", opnd, i),
- value2Ptr);
- ADJUST_PC(3);
-
- case INST_INCR_SCALAR_STK_IMM:
- case INST_INCR_STK_IMM:
- namePtr = POP_OBJECT();
- i = TclGetInt1AtPtr(pc+1);
- DECACHE_STACK_INFO();
- value2Ptr = TclIncrVar2(interp, namePtr, (Tcl_Obj *) NULL, i,
- /*part1NotParsed*/ (opCode == INST_INCR_STK_IMM));
- CACHE_STACK_INFO();
- if (value2Ptr == NULL) {
- TRACE_WITH_OBJ(("%s \"%.30s\" %ld => ERROR: ",
- opName[opCode], O2S(namePtr), i),
- Tcl_GetObjResult(interp));
- result = TCL_ERROR;
- Tcl_DecrRefCount(namePtr);
- goto checkForCatch;
- }
- PUSH_OBJECT(value2Ptr);
- TRACE_WITH_OBJ(("%s \"%.30s\" %ld => ",
- opName[opCode], O2S(namePtr), i), value2Ptr);
- TclDecrRefCount(namePtr);
- ADJUST_PC(2);
-
- case INST_INCR_ARRAY1_IMM:
- {
- Tcl_Obj *elemPtr;
-
- opnd = TclGetUInt1AtPtr(pc+1);
- i = TclGetInt1AtPtr(pc+2);
- elemPtr = POP_OBJECT();
- DECACHE_STACK_INFO();
- value2Ptr = TclIncrElementOfIndexedArray(interp, opnd,
- elemPtr, i);
- CACHE_STACK_INFO();
- if (value2Ptr == NULL) {
- TRACE_WITH_OBJ(("incrArray1Imm %u \"%.30s\" (by %ld) => ERROR: ",
- opnd, O2S(elemPtr), i),
- Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(elemPtr);
- result = TCL_ERROR;
- goto checkForCatch;
- }
- PUSH_OBJECT(value2Ptr);
- TRACE_WITH_OBJ(("incrArray1Imm %u \"%.30s\" (by %ld) => ",
- opnd, O2S(elemPtr), i), value2Ptr);
- Tcl_DecrRefCount(elemPtr);
- }
- ADJUST_PC(3);
-
- case INST_INCR_ARRAY_STK_IMM:
- {
- Tcl_Obj *elemPtr;
-
- i = TclGetInt1AtPtr(pc+1);
- elemPtr = POP_OBJECT();
- namePtr = POP_OBJECT();
- DECACHE_STACK_INFO();
- value2Ptr = TclIncrVar2(interp, namePtr, elemPtr, i,
- /*part1NotParsed*/ 0);
- CACHE_STACK_INFO();
- if (value2Ptr == NULL) {
- TRACE_WITH_OBJ(("incrArrayStkImm \"%.30s(%.30s)\" (by %ld) => ERROR: ",
- O2S(namePtr), O2S(elemPtr), i),
- Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(namePtr);
- Tcl_DecrRefCount(elemPtr);
- result = TCL_ERROR;
- goto checkForCatch;
- }
- PUSH_OBJECT(value2Ptr);
- TRACE_WITH_OBJ(("incrArrayStkImm \"%.30s(%.30s)\" (by %ld) => ",
- O2S(namePtr), O2S(elemPtr), i), value2Ptr);
- Tcl_DecrRefCount(namePtr);
- Tcl_DecrRefCount(elemPtr);
- }
- ADJUST_PC(2);
-
- case INST_JUMP1:
- opnd = TclGetInt1AtPtr(pc+1);
- TRACE(("jump1 %d => new pc %u\n", opnd,
- (unsigned int)(pc + opnd - codePtr->codeStart)));
- ADJUST_PC(opnd);
-
- case INST_JUMP4:
- opnd = TclGetInt4AtPtr(pc+1);
- TRACE(("jump4 %d => new pc %u\n", opnd,
- (unsigned int)(pc + opnd - codePtr->codeStart)));
- ADJUST_PC(opnd);
-
- case INST_JUMP_TRUE4:
- opnd = TclGetInt4AtPtr(pc+1);
- pcAdjustment = 5;
- goto doJumpTrue;
-
- case INST_JUMP_TRUE1:
- opnd = TclGetInt1AtPtr(pc+1);
- pcAdjustment = 2;
-
- doJumpTrue:
- {
- int b;
-
- valuePtr = POP_OBJECT();
- if (valuePtr->typePtr == &tclIntType) {
- b = (valuePtr->internalRep.longValue != 0);
- } else if (valuePtr->typePtr == &tclDoubleType) {
- b = (valuePtr->internalRep.doubleValue != 0.0);
- } else {
- result = Tcl_GetBooleanFromObj(interp, valuePtr, &b);
- if (result != TCL_OK) {
- TRACE_WITH_OBJ(("%s %d => ERROR: ", opName[opCode],
- opnd), Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(valuePtr);
- goto checkForCatch;
- }
- }
- if (b) {
- TRACE(("%s %d => %.20s true, new pc %u\n",
- opName[opCode], opnd, O2S(valuePtr),
- (unsigned int)(pc+opnd - codePtr->codeStart)));
- TclDecrRefCount(valuePtr);
- ADJUST_PC(opnd);
- } else {
- TRACE(("%s %d => %.20s false\n", opName[opCode], opnd,
- O2S(valuePtr)));
- TclDecrRefCount(valuePtr);
- ADJUST_PC(pcAdjustment);
- }
- }
-
- case INST_JUMP_FALSE4:
- opnd = TclGetInt4AtPtr(pc+1);
- pcAdjustment = 5;
- goto doJumpFalse;
-
- case INST_JUMP_FALSE1:
- opnd = TclGetInt1AtPtr(pc+1);
- pcAdjustment = 2;
-
- doJumpFalse:
- {
- int b;
-
- valuePtr = POP_OBJECT();
- if (valuePtr->typePtr == &tclIntType) {
- b = (valuePtr->internalRep.longValue != 0);
- } else if (valuePtr->typePtr == &tclDoubleType) {
- b = (valuePtr->internalRep.doubleValue != 0.0);
- } else {
- result = Tcl_GetBooleanFromObj(interp, valuePtr, &b);
- if (result != TCL_OK) {
- TRACE_WITH_OBJ(("%s %d => ERROR: ", opName[opCode],
- opnd), Tcl_GetObjResult(interp));
- Tcl_DecrRefCount(valuePtr);
- goto checkForCatch;
- }
- }
- if (b) {
- TRACE(("%s %d => %.20s true\n", opName[opCode], opnd,
- O2S(valuePtr)));
- TclDecrRefCount(valuePtr);
- ADJUST_PC(pcAdjustment);
- } else {
- TRACE(("%s %d => %.20s false, new pc %u\n",
- opName[opCode], opnd, O2S(valuePtr),
- (unsigned int)(pc + opnd - codePtr->codeStart)));
- TclDecrRefCount(valuePtr);
- ADJUST_PC(opnd);
- }
- }
-
- case INST_LOR:
- case INST_LAND:
- {
- /*
- * Operands must be numeric, but no int->double conversions
- * are performed.
- */
-
- long i2, iResult;
- double d1;
- char *s;
- Tcl_ObjType *t1Ptr, *t2Ptr;
-
- value2Ptr = POP_OBJECT();
- valuePtr = POP_OBJECT();
- t1Ptr = valuePtr->typePtr;
- t2Ptr = value2Ptr->typePtr;
-
- if (t1Ptr == &tclIntType) {
- i = (valuePtr->internalRep.longValue != 0);
- } else if (t1Ptr == &tclDoubleType) {
- i = (valuePtr->internalRep.doubleValue != 0.0);
- } else { /* FAILS IF NULL STRING REP */
- s = Tcl_GetStringFromObj(valuePtr, (int *) NULL);
- if (TclLooksLikeInt(s)) {
- result = Tcl_GetLongFromObj((Tcl_Interp *) NULL,
- valuePtr, &i);
- i = (i != 0);
- } else {
- result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL,
- valuePtr, &d1);
- i = (d1 != 0.0);
- }
- if (result != TCL_OK) {
- TRACE(("%s \"%.20s\" => ILLEGAL TYPE %s \n",
- opName[opCode], O2S(valuePtr),
- (t1Ptr? t1Ptr->name : "null")));
- IllegalExprOperandType(interp, opCode, valuePtr);
- Tcl_DecrRefCount(valuePtr);
- Tcl_DecrRefCount(value2Ptr);
- goto checkForCatch;
- }
- }
-
- if (t2Ptr == &tclIntType) {
- i2 = (value2Ptr->internalRep.longValue != 0);
- } else if (t2Ptr == &tclDoubleType) {
- i2 = (value2Ptr->internalRep.doubleValue != 0.0);
- } else { /* FAILS IF NULL STRING REP */
- s = Tcl_GetStringFromObj(value2Ptr, (int *) NULL);
- if (TclLooksLikeInt(s)) {
- result = Tcl_GetLongFromObj((Tcl_Interp *) NULL,
- value2Ptr, &i2);
- i2 = (i2 != 0);
- } else {
- result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL,
- value2Ptr, &d1);
- i2 = (d1 != 0.0);
- }
- if (result != TCL_OK) {
- TRACE(("%s \"%.20s\" => ILLEGAL TYPE %s \n",
- opName[opCode], O2S(value2Ptr),
- (t2Ptr? t2Ptr->name : "null")));
- IllegalExprOperandType(interp, opCode, value2Ptr);
- Tcl_DecrRefCount(valuePtr);
- Tcl_DecrRefCount(value2Ptr);
- goto checkForCatch;
- }
- }
-
- /*
- * Reuse the valuePtr object already on stack if possible.
- */
-
- if (opCode == INST_LOR) {
- iResult = (i || i2);
- } else {
- iResult = (i && i2);
- }
- if (Tcl_IsShared(valuePtr)) {
- PUSH_OBJECT(Tcl_NewLongObj(iResult));
- TRACE(("%s %.20s %.20s => %ld\n", opName[opCode],
- O2S(valuePtr), O2S(value2Ptr), iResult));
- TclDecrRefCount(valuePtr);
- } else { /* reuse the valuePtr object */
- TRACE(("%s %.20s %.20s => %ld\n",
- opName[opCode], /* NB: stack top is off by 1 */
- O2S(valuePtr), O2S(value2Ptr), iResult));
- Tcl_SetLongObj(valuePtr, iResult);
- ++stackTop; /* valuePtr now on stk top has right r.c. */
- }
- TclDecrRefCount(value2Ptr);
- }
- ADJUST_PC(1);
-
- case INST_EQ:
- case INST_NEQ:
- case INST_LT:
- case INST_GT:
- case INST_LE:
- case INST_GE:
- {
- /*
- * Any type is allowed but the two operands must have the
- * same type. We will compute value op value2.
- */
-
- Tcl_ObjType *t1Ptr, *t2Ptr;
- char *s1 = NULL; /* Init. avoids compiler warning. */
- char *s2 = NULL; /* Init. avoids compiler warning. */
- long i2 = 0; /* Init. avoids compiler warning. */
- double d1 = 0.0; /* Init. avoids compiler warning. */
- double d2 = 0.0; /* Init. avoids compiler warning. */
- long iResult = 0; /* Init. avoids compiler warning. */
-
- value2Ptr = POP_OBJECT();
- valuePtr = POP_OBJECT();
- t1Ptr = valuePtr->typePtr;
- t2Ptr = value2Ptr->typePtr;
-
- if ((t1Ptr != &tclIntType) && (t1Ptr != &tclDoubleType)) {
- s1 = Tcl_GetStringFromObj(valuePtr, &length);
- if (TclLooksLikeInt(s1)) { /* FAILS IF NULLS */
- (void) Tcl_GetLongFromObj((Tcl_Interp *) NULL,
- valuePtr, &i);
- } else {
- (void) Tcl_GetDoubleFromObj((Tcl_Interp *) NULL,
- valuePtr, &d1);
- }
- t1Ptr = valuePtr->typePtr;
- }
- if ((t2Ptr != &tclIntType) && (t2Ptr != &tclDoubleType)) {
- s2 = Tcl_GetStringFromObj(value2Ptr, &length);
- if (TclLooksLikeInt(s2)) { /* FAILS IF NULLS */
- (void) Tcl_GetLongFromObj((Tcl_Interp *) NULL,
- value2Ptr, &i2);
- } else {
- (void) Tcl_GetDoubleFromObj((Tcl_Interp *) NULL,
- value2Ptr, &d2);
- }
- t2Ptr = value2Ptr->typePtr;
- }
-
- if (((t1Ptr != &tclIntType) && (t1Ptr != &tclDoubleType))
- || ((t2Ptr != &tclIntType) && (t2Ptr != &tclDoubleType))) {
- /*
- * One operand is not numeric. Compare as strings.
- * THIS FAILS IF AN OBJECT'S STRING REP CONTAINS NULLS.
- */
- int cmpValue;
- s1 = TclGetStringFromObj(valuePtr, &length);
- s2 = TclGetStringFromObj(value2Ptr, &length);
- cmpValue = strcmp(s1, s2);
- switch (opCode) {
- case INST_EQ:
- iResult = (cmpValue == 0);
- break;
- case INST_NEQ:
- iResult = (cmpValue != 0);
- break;
- case INST_LT:
- iResult = (cmpValue < 0);
- break;
- case INST_GT:
- iResult = (cmpValue > 0);
- break;
- case INST_LE:
- iResult = (cmpValue <= 0);
- break;
- case INST_GE:
- iResult = (cmpValue >= 0);
- break;
- }
- } else if ((t1Ptr == &tclDoubleType)
- || (t2Ptr == &tclDoubleType)) {
- /*
- * Compare as doubles.
- */
- if (t1Ptr == &tclDoubleType) {
- d1 = valuePtr->internalRep.doubleValue;
- if (t2Ptr == &tclIntType) {
- d2 = value2Ptr->internalRep.longValue;
- } else {
- d2 = value2Ptr->internalRep.doubleValue;
- }
- } else { /* t1Ptr is int, t2Ptr is double */
- d1 = valuePtr->internalRep.longValue;
- d2 = value2Ptr->internalRep.doubleValue;
- }
- switch (opCode) {
- case INST_EQ:
- iResult = d1 == d2;
- break;
- case INST_NEQ:
- iResult = d1 != d2;
- break;
- case INST_LT:
- iResult = d1 < d2;
- break;
- case INST_GT:
- iResult = d1 > d2;
- break;
- case INST_LE:
- iResult = d1 <= d2;
- break;
- case INST_GE:
- iResult = d1 >= d2;
- break;
- }
- } else {
- /*
- * Compare as ints.
- */
- i = valuePtr->internalRep.longValue;
- i2 = value2Ptr->internalRep.longValue;
- switch (opCode) {
- case INST_EQ:
- iResult = i == i2;
- break;
- case INST_NEQ:
- iResult = i != i2;
- break;
- case INST_LT:
- iResult = i < i2;
- break;
- case INST_GT:
- iResult = i > i2;
- break;
- case INST_LE:
- iResult = i <= i2;
- break;
- case INST_GE:
- iResult = i >= i2;
- break;
- }
- }
-
- /*
- * Reuse the valuePtr object already on stack if possible.
- */
-
- if (Tcl_IsShared(valuePtr)) {
- PUSH_OBJECT(Tcl_NewLongObj(iResult));
- TRACE(("%s %.20s %.20s => %ld\n", opName[opCode],
- O2S(valuePtr), O2S(value2Ptr), iResult));
- TclDecrRefCount(valuePtr);
- } else { /* reuse the valuePtr object */
- TRACE(("%s %.20s %.20s => %ld\n",
- opName[opCode], /* NB: stack top is off by 1 */
- O2S(valuePtr), O2S(value2Ptr), iResult));
- Tcl_SetLongObj(valuePtr, iResult);
- ++stackTop; /* valuePtr now on stk top has right r.c. */
- }
- TclDecrRefCount(value2Ptr);
- }
- ADJUST_PC(1);
-
- case INST_MOD:
- case INST_LSHIFT:
- case INST_RSHIFT:
- case INST_BITOR:
- case INST_BITXOR:
- case INST_BITAND:
- {
- /*
- * Only integers are allowed. We compute value op value2.
- */
-
- long i2, rem, negative;
- long iResult = 0; /* Init. avoids compiler warning. */
-
- value2Ptr = POP_OBJECT();
- valuePtr = POP_OBJECT();
- if (valuePtr->typePtr == &tclIntType) {
- i = valuePtr->internalRep.longValue;
- } else { /* try to convert to int */
- result = Tcl_GetLongFromObj((Tcl_Interp *) NULL,
- valuePtr, &i);
- if (result != TCL_OK) {
- TRACE(("%s %.20s %.20s => ILLEGAL 1st TYPE %s\n",
- opName[opCode], O2S(valuePtr), O2S(value2Ptr),
- (valuePtr->typePtr?
- valuePtr->typePtr->name : "null")));
- IllegalExprOperandType(interp, opCode, valuePtr);
- Tcl_DecrRefCount(valuePtr);
- Tcl_DecrRefCount(value2Ptr);
- goto checkForCatch;
- }
- }
- if (value2Ptr->typePtr == &tclIntType) {
- i2 = value2Ptr->internalRep.longValue;
- } else {
- result = Tcl_GetLongFromObj((Tcl_Interp *) NULL,
- value2Ptr, &i2);
- if (result != TCL_OK) {
- TRACE(("%s %.20s %.20s => ILLEGAL 2nd TYPE %s\n",
- opName[opCode], O2S(valuePtr), O2S(value2Ptr),
- (value2Ptr->typePtr?
- value2Ptr->typePtr->name : "null")));
- IllegalExprOperandType(interp, opCode, value2Ptr);
- Tcl_DecrRefCount(valuePtr);
- Tcl_DecrRefCount(value2Ptr);
- goto checkForCatch;
- }
- }
-
- switch (opCode) {
- case INST_MOD:
- /*
- * This code is tricky: C doesn't guarantee much about
- * the quotient or remainder, but Tcl does. The
- * remainder always has the same sign as the divisor and
- * a smaller absolute value.
- */
- if (i2 == 0) {
- TRACE(("mod %ld %ld => DIVIDE BY ZERO\n", i, i2));
- Tcl_DecrRefCount(valuePtr);
- Tcl_DecrRefCount(value2Ptr);
- goto divideByZero;
- }
- negative = 0;
- if (i2 < 0) {
- i2 = -i2;
- i = -i;
- negative = 1;
- }
- rem = i % i2;
- if (rem < 0) {
- rem += i2;
- }
- if (negative) {
- rem = -rem;
- }
- iResult = rem;
- break;
- case INST_LSHIFT:
- iResult = i << i2;
- break;
- case INST_RSHIFT:
- /*
- * The following code is a bit tricky: it ensures that
- * right shifts propagate the sign bit even on machines
- * where ">>" won't do it by default.
- */
- if (i < 0) {
- iResult = ~((~i) >> i2);
- } else {
- iResult = i >> i2;
- }
- break;
- case INST_BITOR:
- iResult = i | i2;
- break;
- case INST_BITXOR:
- iResult = i ^ i2;
- break;
- case INST_BITAND:
- iResult = i & i2;
- break;
- }
-
- /*
- * Reuse the valuePtr object already on stack if possible.
- */
-
- if (Tcl_IsShared(valuePtr)) {
- PUSH_OBJECT(Tcl_NewLongObj(iResult));
- TRACE(("%s %ld %ld => %ld\n", opName[opCode], i, i2,
- iResult));
- TclDecrRefCount(valuePtr);
- } else { /* reuse the valuePtr object */
- TRACE(("%s %ld %ld => %ld\n", opName[opCode], i, i2,
- iResult)); /* NB: stack top is off by 1 */
- Tcl_SetLongObj(valuePtr, iResult);
- ++stackTop; /* valuePtr now on stk top has right r.c. */
- }
- TclDecrRefCount(value2Ptr);
- }
- ADJUST_PC(1);
-
- case INST_ADD:
- case INST_SUB:
- case INST_MULT:
- case INST_DIV:
- {
- /*
- * Operands must be numeric and ints get converted to floats
- * if necessary. We compute value op value2.
- */
-
- Tcl_ObjType *t1Ptr, *t2Ptr;
- long i2, quot, rem;
- double d1, d2;
- long iResult = 0; /* Init. avoids compiler warning. */
- double dResult = 0.0; /* Init. avoids compiler warning. */
- int doDouble = 0; /* 1 if doing floating arithmetic */
-
- value2Ptr = POP_OBJECT();
- valuePtr = POP_OBJECT();
- t1Ptr = valuePtr->typePtr;
- t2Ptr = value2Ptr->typePtr;
-
- if (t1Ptr == &tclIntType) {
- i = valuePtr->internalRep.longValue;
- } else if (t1Ptr == &tclDoubleType) {
- d1 = valuePtr->internalRep.doubleValue;
- } else { /* try to convert; FAILS IF NULLS */
- char *s = Tcl_GetStringFromObj(valuePtr, &length);
- if (TclLooksLikeInt(s)) {
- result = Tcl_GetLongFromObj((Tcl_Interp *) NULL,
- valuePtr, &i);
- } else {
- result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL,
- valuePtr, &d1);
- }
- if (result != TCL_OK) {
- TRACE(("%s %.20s %.20s => ILLEGAL 1st TYPE %s\n",
- opName[opCode], s, O2S(value2Ptr),
- (valuePtr->typePtr?
- valuePtr->typePtr->name : "null")));
- IllegalExprOperandType(interp, opCode, valuePtr);
- Tcl_DecrRefCount(valuePtr);
- Tcl_DecrRefCount(value2Ptr);
- goto checkForCatch;
- }
- t1Ptr = valuePtr->typePtr;
- }
-
- if (t2Ptr == &tclIntType) {
- i2 = value2Ptr->internalRep.longValue;
- } else if (t2Ptr == &tclDoubleType) {
- d2 = value2Ptr->internalRep.doubleValue;
- } else { /* try to convert; FAILS IF NULLS */
- char *s = Tcl_GetStringFromObj(value2Ptr, &length);
- if (TclLooksLikeInt(s)) {
- result = Tcl_GetLongFromObj((Tcl_Interp *) NULL,
- value2Ptr, &i2);
- } else {
- result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL,
- value2Ptr, &d2);
- }
- if (result != TCL_OK) {
- TRACE(("%s %.20s %.20s => ILLEGAL 2nd TYPE %s\n",
- opName[opCode], O2S(valuePtr), s,
- (value2Ptr->typePtr?
- value2Ptr->typePtr->name : "null")));
- IllegalExprOperandType(interp, opCode, value2Ptr);
- Tcl_DecrRefCount(valuePtr);
- Tcl_DecrRefCount(value2Ptr);
- goto checkForCatch;
- }
- t2Ptr = value2Ptr->typePtr;
- }
-
- if ((t1Ptr == &tclDoubleType) || (t2Ptr == &tclDoubleType)) {
- /*
- * Do double arithmetic.
- */
- doDouble = 1;
- if (t1Ptr == &tclIntType) {
- d1 = i; /* promote value 1 to double */
- } else if (t2Ptr == &tclIntType) {
- d2 = i2; /* promote value 2 to double */
- }
- switch (opCode) {
- case INST_ADD:
- dResult = d1 + d2;
- break;
- case INST_SUB:
- dResult = d1 - d2;
- break;
- case INST_MULT:
- dResult = d1 * d2;
- break;
- case INST_DIV:
- if (d2 == 0.0) {
- TRACE(("div %.6g %.6g => DIVIDE BY ZERO\n",
- d1, d2));
- Tcl_DecrRefCount(valuePtr);
- Tcl_DecrRefCount(value2Ptr);
- goto divideByZero;
- }
- dResult = d1 / d2;
- break;
- }
-
- /*
- * Check now for IEEE floating-point error.
- */
-
- if (IS_NAN(dResult) || IS_INF(dResult)) {
- TRACE(("%s %.20s %.20s => IEEE FLOATING PT ERROR\n",
- opName[opCode], O2S(valuePtr), O2S(value2Ptr)));
- TclExprFloatError(interp, dResult);
- result = TCL_ERROR;
- Tcl_DecrRefCount(valuePtr);
- Tcl_DecrRefCount(value2Ptr);
- goto checkForCatch;
- }
- } else {
- /*
- * Do integer arithmetic.
- */
- switch (opCode) {
- case INST_ADD:
- iResult = i + i2;
- break;
- case INST_SUB:
- iResult = i - i2;
- break;
- case INST_MULT:
- iResult = i * i2;
- break;
- case INST_DIV:
- /*
- * This code is tricky: C doesn't guarantee much
- * about the quotient or remainder, but Tcl does.
- * The remainder always has the same sign as the
- * divisor and a smaller absolute value.
- */
- if (i2 == 0) {
- TRACE(("div %ld %ld => DIVIDE BY ZERO\n",
- i, i2));
- Tcl_DecrRefCount(valuePtr);
- Tcl_DecrRefCount(value2Ptr);
- goto divideByZero;
- }
- if (i2 < 0) {
- i2 = -i2;
- i = -i;
- }
- quot = i / i2;
- rem = i % i2;
- if (rem < 0) {
- quot -= 1;
- }
- iResult = quot;
- break;
- }
- }
-
- /*
- * Reuse the valuePtr object already on stack if possible.
- */
-
- if (Tcl_IsShared(valuePtr)) {
- if (doDouble) {
- PUSH_OBJECT(Tcl_NewDoubleObj(dResult));
- TRACE(("%s %.6g %.6g => %.6g\n", opName[opCode],
- d1, d2, dResult));
- } else {
- PUSH_OBJECT(Tcl_NewLongObj(iResult));
- TRACE(("%s %ld %ld => %ld\n", opName[opCode],
- i, i2, iResult));
- }
- TclDecrRefCount(valuePtr);
- } else { /* reuse the valuePtr object */
- if (doDouble) { /* NB: stack top is off by 1 */
- TRACE(("%s %.6g %.6g => %.6g\n", opName[opCode],
- d1, d2, dResult));
- Tcl_SetDoubleObj(valuePtr, dResult);
- } else {
- TRACE(("%s %ld %ld => %ld\n", opName[opCode],
- i, i2, iResult));
- Tcl_SetLongObj(valuePtr, iResult);
- }
- ++stackTop; /* valuePtr now on stk top has right r.c. */
- }
- TclDecrRefCount(value2Ptr);
- }
- ADJUST_PC(1);
-
- case INST_UPLUS:
- {
- /*
- * Operand must be numeric.
- */
-
- double d;
- Tcl_ObjType *tPtr;
-
- valuePtr = stackPtr[stackTop].o;
- tPtr = valuePtr->typePtr;
- if ((tPtr != &tclIntType) && (tPtr != &tclDoubleType)) {
- char *s = Tcl_GetStringFromObj(valuePtr, (int *) NULL);
- if (TclLooksLikeInt(s)) { /* FAILS IF NULLS */
- result = Tcl_GetLongFromObj((Tcl_Interp *) NULL,
- valuePtr, &i);
- } else {
- result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL,
- valuePtr, &d);
- }
- if (result != TCL_OK) {
- TRACE(("%s \"%.20s\" => ILLEGAL TYPE %s \n",
- opName[opCode], s,
- (tPtr? tPtr->name : "null")));
- IllegalExprOperandType(interp, opCode, valuePtr);
- goto checkForCatch;
- }
- }
- TRACE_WITH_OBJ(("uplus %s => ", O2S(valuePtr)), valuePtr);
- }
- ADJUST_PC(1);
-
- case INST_UMINUS:
- case INST_LNOT:
- {
- /*
- * The operand must be numeric. If the operand object is
- * unshared modify it directly, otherwise create a copy to
- * modify: this is "copy on write". free any old string
- * representation since it is now invalid.
- */
-
- double d;
- Tcl_ObjType *tPtr;
-
- valuePtr = POP_OBJECT();
- tPtr = valuePtr->typePtr;
- if ((tPtr != &tclIntType) && (tPtr != &tclDoubleType)) {
- char *s = Tcl_GetStringFromObj(valuePtr, (int *) NULL);
- if (TclLooksLikeInt(s)) { /* FAILS IF NULLS */
- result = Tcl_GetLongFromObj((Tcl_Interp *) NULL,
- valuePtr, &i);
- } else {
- result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL,
- valuePtr, &d);
- }
- if (result != TCL_OK) {
- TRACE(("%s \"%.20s\" => ILLEGAL TYPE %s\n",
- opName[opCode], s,
- (tPtr? tPtr->name : "null")));
- IllegalExprOperandType(interp, opCode, valuePtr);
- Tcl_DecrRefCount(valuePtr);
- goto checkForCatch;
- }
- tPtr = valuePtr->typePtr;
- }
-
- if (Tcl_IsShared(valuePtr)) {
- /*
- * Create a new object.
- */
- if (tPtr == &tclIntType) {
- i = valuePtr->internalRep.longValue;
- objPtr = Tcl_NewLongObj(
- (opCode == INST_UMINUS)? -i : !i);
- TRACE_WITH_OBJ(("%s %ld => ", opName[opCode], i),
- objPtr); /* NB: stack top is off by 1 */
- } else {
- d = valuePtr->internalRep.doubleValue;
- if (opCode == INST_UMINUS) {
- objPtr = Tcl_NewDoubleObj(-d);
- } else {
- /*
- * Should be able to use "!d", but apparently
- * some compilers can't handle it.
- */
- objPtr = Tcl_NewLongObj((d==0.0)? 1 : 0);
- }
- TRACE_WITH_OBJ(("%s %.6g => ", opName[opCode], d),
- objPtr); /* NB: stack top is off by 1 */
- }
- PUSH_OBJECT(objPtr);
- TclDecrRefCount(valuePtr);
- } else {
- /*
- * valuePtr is unshared. Modify it directly.
- */
- if (tPtr == &tclIntType) {
- i = valuePtr->internalRep.longValue;
- Tcl_SetLongObj(valuePtr,
- (opCode == INST_UMINUS)? -i : !i);
- TRACE_WITH_OBJ(("%s %ld => ", opName[opCode], i),
- valuePtr); /* NB: stack top is off by 1 */
- } else {
- d = valuePtr->internalRep.doubleValue;
- if (opCode == INST_UMINUS) {
- Tcl_SetDoubleObj(valuePtr, -d);
- } else {
- /*
- * Should be able to use "!d", but apparently
- * some compilers can't handle it.
- */
- Tcl_SetLongObj(valuePtr, (d==0.0)? 1 : 0);
- }
- TRACE_WITH_OBJ(("%s %.6g => ", opName[opCode], d),
- valuePtr); /* NB: stack top is off by 1 */
- }
- ++stackTop; /* valuePtr now on stk top has right r.c. */
- }
- }
- ADJUST_PC(1);
-
- case INST_BITNOT:
- {
- /*
- * The operand must be an integer. If the operand object is
- * unshared modify it directly, otherwise modify a copy.
- * Free any old string representation since it is now
- * invalid.
- */
-
- Tcl_ObjType *tPtr;
-
- valuePtr = POP_OBJECT();
- tPtr = valuePtr->typePtr;
- if (tPtr != &tclIntType) {
- result = Tcl_GetLongFromObj((Tcl_Interp *) NULL,
- valuePtr, &i);
- if (result != TCL_OK) { /* try to convert to double */
- TRACE(("bitnot \"%.20s\" => ILLEGAL TYPE %s\n",
- O2S(valuePtr), (tPtr? tPtr->name : "null")));
- IllegalExprOperandType(interp, opCode, valuePtr);
- Tcl_DecrRefCount(valuePtr);
- goto checkForCatch;
- }
- }
-
- i = valuePtr->internalRep.longValue;
- if (Tcl_IsShared(valuePtr)) {
- PUSH_OBJECT(Tcl_NewLongObj(~i));
- TRACE(("bitnot 0x%lx => (%lu)\n", i, ~i));
- TclDecrRefCount(valuePtr);
- } else {
- /*
- * valuePtr is unshared. Modify it directly.
- */
- Tcl_SetLongObj(valuePtr, ~i);
- ++stackTop; /* valuePtr now on stk top has right r.c. */
- TRACE(("bitnot 0x%lx => (%lu)\n", i, ~i));
- }
- }
- ADJUST_PC(1);
-
- case INST_CALL_BUILTIN_FUNC1:
- opnd = TclGetUInt1AtPtr(pc+1);
- {
- /*
- * Call one of the built-in Tcl math functions.
- */
-
- BuiltinFunc *mathFuncPtr;
-
- if ((opnd < 0) || (opnd > LAST_BUILTIN_FUNC)) {
- TRACE(("UNRECOGNIZED BUILTIN FUNC CODE %d\n", opnd));
- panic("TclExecuteByteCode: unrecognized builtin function code %d", opnd);
- }
- mathFuncPtr = &(builtinFuncTable[opnd]);
- DECACHE_STACK_INFO();
- tcl_MathInProgress++;
- result = (*mathFuncPtr->proc)(interp, eePtr,
- mathFuncPtr->clientData);
- tcl_MathInProgress--;
- CACHE_STACK_INFO();
- if (result != TCL_OK) {
- goto checkForCatch;
- }
- TRACE_WITH_OBJ(("callBuiltinFunc1 %d => ", opnd),
- stackPtr[stackTop].o);
- }
- ADJUST_PC(2);
-
- case INST_CALL_FUNC1:
- opnd = TclGetUInt1AtPtr(pc+1);
- {
- /*
- * Call a non-builtin Tcl math function previously
- * registered by a call to Tcl_CreateMathFunc.
- */
-
- int objc = opnd; /* Number of arguments. The function name
- * is the 0-th argument. */
- Tcl_Obj **objv; /* The array of arguments. The function
- * name is objv[0]. */
-
- objv = &(stackPtr[stackTop - (objc-1)].o); /* "objv[0]" */
- DECACHE_STACK_INFO();
- tcl_MathInProgress++;
- result = ExprCallMathFunc(interp, eePtr, objc, objv);
- tcl_MathInProgress--;
- CACHE_STACK_INFO();
- if (result != TCL_OK) {
- goto checkForCatch;
- }
- TRACE_WITH_OBJ(("callFunc1 %d => ", objc),
- stackPtr[stackTop].o);
- ADJUST_PC(2);
- }
-
- case INST_TRY_CVT_TO_NUMERIC:
- {
- /*
- * Try to convert the topmost stack object to an int or
- * double object. This is done in order to support Tcl's
- * policy of interpreting operands if at all possible as
- * first integers, else floating-point numbers.
- */
-
- double d;
- char *s;
- Tcl_ObjType *tPtr;
- int converted, shared;
-
- valuePtr = stackPtr[stackTop].o;
- tPtr = valuePtr->typePtr;
- converted = 0;
- if ((tPtr != &tclIntType) && (tPtr != &tclDoubleType)) {
- s = Tcl_GetStringFromObj(valuePtr, (int *) NULL);
- if (TclLooksLikeInt(s)) { /* FAILS IF NULLS */
- result = Tcl_GetLongFromObj((Tcl_Interp *) NULL,
- valuePtr, &i);
- } else {
- result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL,
- valuePtr, &d);
- }
- if (result == TCL_OK) {
- converted = 1;
- }
- result = TCL_OK; /* reset the result variable */
- tPtr = valuePtr->typePtr;
- }
-
- /*
- * Ensure that the topmost stack object, if numeric, has a
- * string rep the same as the formatted version of its
- * internal rep. This is used, e.g., to make sure that "expr
- * {0001}" yields "1", not "0001". We implement this by
- * _discarding_ the string rep since we know it will be
- * regenerated, if needed later, by formatting the internal
- * rep's value. Also check if there has been an IEEE
- * floating point error.
- */
-
- if ((tPtr == &tclIntType) || (tPtr == &tclDoubleType)) {
- shared = 0;
- if (Tcl_IsShared(valuePtr)) {
- shared = 1;
- if (tPtr == &tclIntType) {
- i = valuePtr->internalRep.longValue;
- objPtr = Tcl_NewLongObj(i);
- } else {
- d = valuePtr->internalRep.doubleValue;
- objPtr = Tcl_NewDoubleObj(d);
- }
- Tcl_IncrRefCount(objPtr);
- TclDecrRefCount(valuePtr);
- valuePtr = objPtr;
- tPtr = valuePtr->typePtr;
- } else {
- Tcl_InvalidateStringRep(valuePtr);
- }
- stackPtr[stackTop].o = valuePtr;
-
- if (tPtr == &tclDoubleType) {
- d = valuePtr->internalRep.doubleValue;
- if (IS_NAN(d) || IS_INF(d)) {
- TRACE(("tryCvtToNumeric \"%.20s\" => IEEE FLOATING PT ERROR\n",
- O2S(valuePtr)));
- TclExprFloatError(interp, d);
- result = TCL_ERROR;
- goto checkForCatch;
- }
- }
- shared = shared; /* lint, shared not used. */
- converted = converted; /* lint, converted not used. */
- TRACE(("tryCvtToNumeric \"%.20s\" => numeric, %s, %s\n",
- O2S(valuePtr),
- (converted? "converted" : "not converted"),
- (shared? "shared" : "not shared")));
- } else {
- TRACE(("tryCvtToNumeric \"%.20s\" => not numeric\n",
- O2S(valuePtr)));
- }
- }
- ADJUST_PC(1);
-
- case INST_BREAK:
- /*
- * First reset the interpreter's result. Then find the closest
- * enclosing loop or catch exception range, if any. If a loop is
- * found, terminate its execution. If the closest is a catch
- * exception range, jump to its catchOffset. If no enclosing
- * range is found, stop execution and return TCL_BREAK.
- */
-
- Tcl_ResetResult(interp);
- rangePtr = TclGetExceptionRangeForPc(pc, /*catchOnly*/ 0,
- codePtr);
- if (rangePtr == NULL) {
- TRACE(("break => no encl. loop or catch, returning TCL_BREAK\n"));
- result = TCL_BREAK;
- goto abnormalReturn; /* no catch exists to check */
- }
- switch (rangePtr->type) {
- case LOOP_EXCEPTION_RANGE:
- result = TCL_OK;
- TRACE(("break => range at %d, new pc %d\n",
- rangePtr->codeOffset, rangePtr->breakOffset));
- break;
- case CATCH_EXCEPTION_RANGE:
- result = TCL_BREAK;
- TRACE(("break => ...\n"));
- goto processCatch; /* it will use rangePtr */
- default:
- panic("TclExecuteByteCode: unrecognized ExceptionRange type %d\n", rangePtr->type);
- }
- pc = (codePtr->codeStart + rangePtr->breakOffset);
- continue; /* restart outer instruction loop at pc */
-
- case INST_CONTINUE:
- /*
- * Find the closest enclosing loop or catch exception range,
- * if any. If a loop is found, skip to its next iteration.
- * If the closest is a catch exception range, jump to its
- * catchOffset. If no enclosing range is found, stop
- * execution and return TCL_CONTINUE.
- */
-
- Tcl_ResetResult(interp);
- rangePtr = TclGetExceptionRangeForPc(pc, /*catchOnly*/ 0,
- codePtr);
- if (rangePtr == NULL) {
- TRACE(("continue => no encl. loop or catch, returning TCL_CONTINUE\n"));
- result = TCL_CONTINUE;
- goto abnormalReturn;
- }
- switch (rangePtr->type) {
- case LOOP_EXCEPTION_RANGE:
- if (rangePtr->continueOffset == -1) {
- TRACE(("continue => loop w/o continue, checking for catch\n"));
- goto checkForCatch;
- } else {
- result = TCL_OK;
- TRACE(("continue => range at %d, new pc %d\n",
- rangePtr->codeOffset, rangePtr->continueOffset));
- }
- break;
- case CATCH_EXCEPTION_RANGE:
- result = TCL_CONTINUE;
- TRACE(("continue => ...\n"));
- goto processCatch; /* it will use rangePtr */
- default:
- panic("TclExecuteByteCode: unrecognized ExceptionRange type %d\n", rangePtr->type);
- }
- pc = (codePtr->codeStart + rangePtr->continueOffset);
- continue; /* restart outer instruction loop at pc */
-
- case INST_FOREACH_START4:
- opnd = TclGetUInt4AtPtr(pc+1);
- {
- /*
- * Initialize the temporary local var that holds the count
- * of the number of iterations of the loop body to -1.
- */
-
- ForeachInfo *infoPtr = (ForeachInfo *)
- codePtr->auxDataArrayPtr[opnd].clientData;
- int iterTmpIndex = infoPtr->loopIterNumTmp;
- CallFrame *varFramePtr = iPtr->varFramePtr;
- Var *compiledLocals = varFramePtr->compiledLocals;
- Var *iterVarPtr;
- Tcl_Obj *oldValuePtr;
-
- iterVarPtr = &(compiledLocals[iterTmpIndex]);
- oldValuePtr = iterVarPtr->value.objPtr;
- if (oldValuePtr == NULL) {
- iterVarPtr->value.objPtr = Tcl_NewLongObj(-1);
- Tcl_IncrRefCount(iterVarPtr->value.objPtr);
- if (oldValuePtr != NULL) {
- Tcl_DecrRefCount(oldValuePtr);
- }
- } else {
- Tcl_SetLongObj(oldValuePtr, -1);
- }
- TclSetVarScalar(iterVarPtr);
- TclClearVarUndefined(iterVarPtr);
- TRACE(("foreach_start4 %u => loop iter count temp %d\n",
- opnd, iterTmpIndex));
- }
- ADJUST_PC(5);
-
- case INST_FOREACH_STEP4:
- opnd = TclGetUInt4AtPtr(pc+1);
- {
- /*
- * "Step" a foreach loop (i.e., begin its next iteration) by
- * assigning the next value list element to each loop var.
- */
-
- ForeachInfo *infoPtr = (ForeachInfo *)
- codePtr->auxDataArrayPtr[opnd].clientData;
- ForeachVarList *varListPtr;
- int numLists = infoPtr->numLists;
- int iterTmpIndex = infoPtr->loopIterNumTmp;
- CallFrame *varFramePtr = iPtr->varFramePtr;
- Var *compiledLocals = varFramePtr->compiledLocals;
- int iterNum, listTmpIndex, listLen, numVars;
- int varIndex, valIndex, j;
- Tcl_Obj *listPtr, *elemPtr, *oldValuePtr;
- List *listRepPtr;
- Var *iterVarPtr, *listVarPtr;
- int continueLoop = 0;
-
- /*
- * Increment the temp holding the loop iteration number.
- */
-
- iterVarPtr = &(compiledLocals[iterTmpIndex]);
- oldValuePtr = iterVarPtr->value.objPtr;
- iterNum = (oldValuePtr->internalRep.longValue + 1);
- Tcl_SetLongObj(oldValuePtr, iterNum);
-
- /*
- * Check whether all value lists are exhausted and we should
- * stop the loop.
- */
-
- listTmpIndex = infoPtr->firstListTmp;
- for (i = 0; i < numLists; i++) {
- varListPtr = infoPtr->varLists[i];
- numVars = varListPtr->numVars;
-
- listVarPtr = &(compiledLocals[listTmpIndex]);
- listPtr = listVarPtr->value.objPtr;
- result = Tcl_ListObjLength(interp, listPtr, &listLen);
- if (result != TCL_OK) {
- TRACE_WITH_OBJ(("foreach_step4 %u => ERROR converting list %ld, \"%s\": ",
- opnd, i, O2S(listPtr)),
- Tcl_GetObjResult(interp));
- goto checkForCatch;
- }
- if (listLen > (iterNum * numVars)) {
- continueLoop = 1;
- }
- listTmpIndex++;
- }
-
- /*
- * If some var in some var list still has a remaining list
- * element iterate one more time. Assign to var the next
- * element from its value list. We already checked above
- * that each list temp holds a valid list object.
- */
-
- if (continueLoop) {
- listTmpIndex = infoPtr->firstListTmp;
- for (i = 0; i < numLists; i++) {
- varListPtr = infoPtr->varLists[i];
- numVars = varListPtr->numVars;
-
- listVarPtr = &(compiledLocals[listTmpIndex]);
- listPtr = listVarPtr->value.objPtr;
- listRepPtr = (List *)
- listPtr->internalRep.otherValuePtr;
- listLen = listRepPtr->elemCount;
-
- valIndex = (iterNum * numVars);
- for (j = 0; j < numVars; j++) {
- int setEmptyStr = 0;
- if (valIndex >= listLen) {
- setEmptyStr = 1;
- elemPtr = Tcl_NewObj();
- } else {
- elemPtr = listRepPtr->elements[valIndex];
- }
-
- varIndex = varListPtr->varIndexes[j];
- DECACHE_STACK_INFO();
- value2Ptr = TclSetIndexedScalar(interp,
- varIndex, elemPtr, /*leaveErrorMsg*/ 1);
- CACHE_STACK_INFO();
- if (value2Ptr == NULL) {
- TRACE_WITH_OBJ(("foreach_step4 %u => ERROR init. index temp %d: ",
- opnd, varIndex),
- Tcl_GetObjResult(interp));
- if (setEmptyStr) {
- Tcl_DecrRefCount(elemPtr); /* unneeded */
- }
- result = TCL_ERROR;
- goto checkForCatch;
- }
- valIndex++;
- }
- listTmpIndex++;
- }
- }
-
- /*
- * Now push a "1" object if at least one value list had a
- * remaining element and the loop should continue.
- * Otherwise push "0".
- */
-
- PUSH_OBJECT(Tcl_NewLongObj(continueLoop));
- TRACE(("foreach_step4 %u => %d lists, iter %d, %s loop\n",
- opnd, numLists, iterNum,
- (continueLoop? "continue" : "exit")));
- }
- ADJUST_PC(5);
-
- case INST_BEGIN_CATCH4:
- /*
- * Record start of the catch command with exception range index
- * equal to the operand. Push the current stack depth onto the
- * special catch stack.
- */
- catchStackPtr[++catchTop] = stackTop;
- TRACE(("beginCatch4 %u => catchTop=%d, stackTop=%d\n",
- TclGetUInt4AtPtr(pc+1), catchTop, stackTop));
- ADJUST_PC(5);
-
- case INST_END_CATCH:
- catchTop--;
- result = TCL_OK;
- TRACE(("endCatch => catchTop=%d\n", catchTop));
- ADJUST_PC(1);
-
- case INST_PUSH_RESULT:
- PUSH_OBJECT(Tcl_GetObjResult(interp));
- TRACE_WITH_OBJ(("pushResult => "), Tcl_GetObjResult(interp));
- ADJUST_PC(1);
-
- case INST_PUSH_RETURN_CODE:
- PUSH_OBJECT(Tcl_NewLongObj(result));
- TRACE(("pushReturnCode => %u\n", result));
- ADJUST_PC(1);
-
- default:
- TRACE(("UNRECOGNIZED INSTRUCTION %u\n", opCode));
- panic("TclExecuteByteCode: unrecognized opCode %u", opCode);
- } /* end of switch on opCode */
-
- /*
- * Division by zero in an expression. Control only reaches this
- * point by "goto divideByZero".
- */
-
- divideByZero:
- Tcl_ResetResult(interp);
- Tcl_AppendToObj(Tcl_GetObjResult(interp), "divide by zero", -1);
- Tcl_SetErrorCode(interp, "ARITH", "DIVZERO", "divide by zero",
- (char *) NULL);
- result = TCL_ERROR;
-
- /*
- * Execution has generated an "exception" such as TCL_ERROR. If the
- * exception is an error, record information about what was being
- * executed when the error occurred. Find the closest enclosing
- * catch range, if any. If no enclosing catch range is found, stop
- * execution and return the "exception" code.
- */
-
- checkForCatch:
- if ((result == TCL_ERROR) && !(iPtr->flags & ERR_ALREADY_LOGGED)) {
- int numChars;
- char *cmd = GetSrcInfoForPc(pc, codePtr, &numChars);
- char buf[200];
- register char *p;
- char *ellipsis = "";
-
- /*
- * Print the command in the error message (up to a certain
- * number of characters, or up to the first newline).
- */
-
- iPtr->errorLine = 1;
- if (cmd != NULL) {
- for (p = codePtr->source; p != cmd; p++) {
- if (*p == '\n') {
- iPtr->errorLine++;
- }
- }
- for ( ; (isspace(UCHAR(*p)) || (*p == ';')); p++) {
- if (*p == '\n') {
- iPtr->errorLine++;
- }
- }
-
- if (numChars > 150) {
- numChars = 150;
- ellipsis = "...";
- }
- if (!(iPtr->flags & ERR_IN_PROGRESS)) {
- sprintf(buf, "\n while executing\n\"%.*s%s\"",
- numChars, cmd, ellipsis);
- } else {
- sprintf(buf, "\n invoked from within\n\"%.*s%s\"",
- numChars, cmd, ellipsis);
- }
- Tcl_AddObjErrorInfo(interp, buf, -1);
- iPtr->flags |= ERR_ALREADY_LOGGED;
- }
- }
- rangePtr = TclGetExceptionRangeForPc(pc, /*catchOnly*/ 1, codePtr);
- if (rangePtr == NULL) {
- TRACE((" ... no enclosing catch, returning %s\n",
- StringForResultCode(result)));
- goto abnormalReturn;
- }
-
- /*
- * A catch exception range (rangePtr) was found to handle an
- * "exception". It was found either by checkForCatch just above or
- * by an instruction during break, continue, or error processing.
- * Jump to its catchOffset after unwinding the operand stack to
- * the depth it had when starting to execute the range's catch
- * command.
- */
-
- processCatch:
- while (stackTop > catchStackPtr[catchTop]) {
- valuePtr = POP_OBJECT();
- TclDecrRefCount(valuePtr);
- }
- TRACE((" ... found catch at %d, catchTop=%d, unwound to %d, new pc %u\n",
- rangePtr->codeOffset, catchTop, catchStackPtr[catchTop],
- (unsigned int)(rangePtr->catchOffset)));
- pc = (codePtr->codeStart + rangePtr->catchOffset);
- continue; /* restart the execution loop at pc */
- } /* end of infinite loop dispatching on instructions */
-
- /*
- * Abnormal return code. Restore the stack to state it had when starting
- * to execute the ByteCode.
- */
-
- abnormalReturn:
- while (stackTop > initStackTop) {
- valuePtr = POP_OBJECT();
- Tcl_DecrRefCount(valuePtr);
- }
-
- /*
- * Free the catch stack array if malloc'ed storage was used.
- */
-
- done:
- if (catchStackPtr != catchStackStorage) {
- ckfree((char *) catchStackPtr);
- }
- eePtr->stackTop = initStackTop;
- return result;
- #undef STATIC_CATCH_STACK_SIZE
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * PrintByteCodeInfo --
- *
- * This procedure prints a summary about a bytecode object to stdout.
- * It is called by TclExecuteByteCode when starting to execute the
- * bytecode object if tclTraceExec has the value 2 or more.
- *
- * Results:
- * None.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- PrintByteCodeInfo(codePtr)
- register ByteCode *codePtr; /* The bytecode whose summary is printed
- * to stdout. */
- {
- Proc *procPtr = codePtr->procPtr;
- int numCmds = codePtr->numCommands;
- int numObjs = codePtr->numObjects;
- int objBytes, i;
-
- objBytes = (numObjs * sizeof(Tcl_Obj));
- for (i = 0; i < numObjs; i++) {
- Tcl_Obj *litObjPtr = codePtr->objArrayPtr[i];
- if (litObjPtr->bytes != NULL) {
- objBytes += litObjPtr->length;
- }
- }
-
- fprintf(stdout, "\nExecuting ByteCode 0x%x, ref ct %u, epoch %u, interp 0x%x(epoch %u)\n",
- (unsigned int) codePtr, codePtr->refCount,
- codePtr->compileEpoch, (unsigned int) codePtr->iPtr,
- codePtr->iPtr->compileEpoch);
-
- fprintf(stdout, " Source: ");
- TclPrintSource(stdout, codePtr->source, 70);
-
- fprintf(stdout, "\n Cmds %d, chars %d, inst %u, objs %u, aux %d, stk depth %u, code/src %.2fn",
- numCmds, codePtr->numSrcChars, codePtr->numCodeBytes, numObjs,
- codePtr->numAuxDataItems, codePtr->maxStackDepth,
- (codePtr->numSrcChars?
- ((float)codePtr->totalSize)/((float)codePtr->numSrcChars) : 0.0));
-
- fprintf(stdout, " Code %d = %d(header)+%d(inst)+%d(objs)+%d(exc)+%d(aux)+%d(cmd map)\n",
- codePtr->totalSize, sizeof(ByteCode), codePtr->numCodeBytes,
- objBytes, (codePtr->numExcRanges * sizeof(ExceptionRange)),
- (codePtr->numAuxDataItems * sizeof(AuxData)),
- codePtr->numCmdLocBytes);
-
- if (procPtr != NULL) {
- fprintf(stdout,
- " Proc 0x%x, ref ct %d, args %d, compiled locals %d\n",
- (unsigned int) procPtr, procPtr->refCount,
- procPtr->numArgs, procPtr->numCompiledLocals);
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * ValidatePcAndStackTop --
- *
- * This procedure is called by TclExecuteByteCode when debugging to
- * verify that the program counter and stack top are valid during
- * execution.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Prints a message to stderr and panics if either the pc or stack
- * top are invalid.
- *
- *----------------------------------------------------------------------
- */
-
- #ifdef TCL_COMPILE_DEBUG
- static void
- ValidatePcAndStackTop(codePtr, pc, stackTop, stackLowerBound, stackUpperBound)
- register ByteCode *codePtr; /* The bytecode whose summary is printed
- * to stdout. */
- unsigned char *pc; /* Points to first byte of a bytecode
- * instruction. The program counter. */
- int stackTop; /* Current stack top. Must be between
- * stackLowerBound and stackUpperBound
- * (inclusive). */
- int stackLowerBound; /* Smallest legal value for stackTop. */
- int stackUpperBound; /* Greatest legal value for stackTop. */
- {
- unsigned int relativePc = (unsigned int) (pc - codePtr->codeStart);
- unsigned int codeStart = (unsigned int) codePtr->codeStart;
- unsigned int codeEnd = (unsigned int)
- (codePtr->codeStart + codePtr->numCodeBytes);
- unsigned char opCode = *pc;
-
- if (((unsigned int) pc < codeStart) || ((unsigned int) pc > codeEnd)) {
- fprintf(stderr, "\nBad instruction pc 0x%x in TclExecuteByteCode\n",
- (unsigned int) pc);
- panic("TclExecuteByteCode execution failure: bad pc");
- }
- if ((unsigned int) opCode > LAST_INST_OPCODE) {
- fprintf(stderr, "\nBad opcode %d at pc %u in TclExecuteByteCode\n",
- (unsigned int) opCode, relativePc);
- panic("TclExecuteByteCode execution failure: bad opcode");
- }
- if ((stackTop < stackLowerBound) || (stackTop > stackUpperBound)) {
- int numChars;
- char *cmd = GetSrcInfoForPc(pc, codePtr, &numChars);
- char *ellipsis = "";
-
- fprintf(stderr, "\nBad stack top %d at pc %u in TclExecuteByteCode",
- stackTop, relativePc);
- if (cmd != NULL) {
- if (numChars > 100) {
- numChars = 100;
- ellipsis = "...";
- }
- fprintf(stderr, "\n executing %.*s%s\n", numChars, cmd,
- ellipsis);
- } else {
- fprintf(stderr, "\n");
- }
- panic("TclExecuteByteCode execution failure: bad stack top");
- }
- }
- #endif /* TCL_COMPILE_DEBUG */
-
- /*
- *----------------------------------------------------------------------
- *
- * IllegalExprOperandType --
- *
- * Used by TclExecuteByteCode to add an error message to errorInfo
- * when an illegal operand type is detected by an expression
- * instruction. The argument opCode holds the failing instruction's
- * opcode and opndPtr holds the operand object in error.
- *
- * Results:
- * None.
- *
- * Side effects:
- * An error message is appended to errorInfo.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- IllegalExprOperandType(interp, opCode, opndPtr)
- Tcl_Interp *interp; /* Interpreter to which error information
- * pertains. */
- unsigned int opCode; /* The instruction opcode being executed
- * when the illegal type was found. */
- Tcl_Obj *opndPtr; /* Points to the operand holding the value
- * with the illegal type. */
- {
- Tcl_ResetResult(interp);
- if ((opndPtr->bytes == NULL) || (opndPtr->length == 0)) {
- Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
- "can't use empty string as operand of \"",
- operatorStrings[opCode - INST_BITOR], "\"", (char *) NULL);
- } else {
- Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
- "can't use ", ((opndPtr->typePtr == &tclDoubleType) ?
- "floating-point value" : "non-numeric string"),
- " as operand of \"", operatorStrings[opCode - INST_BITOR],
- "\"", (char *) NULL);
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * CallTraceProcedure --
- *
- * Invokes a trace procedure registered with an interpreter. These
- * procedures trace command execution. Currently this trace procedure
- * is called with the address of the string-based Tcl_CmdProc for the
- * command, not the Tcl_ObjCmdProc.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Those side effects made by the trace procedure.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- CallTraceProcedure(interp, tracePtr, cmdPtr, command, numChars, objc, objv)
- Tcl_Interp *interp; /* The current interpreter. */
- register Trace *tracePtr; /* Describes the trace procedure to call. */
- Command *cmdPtr; /* Points to command's Command struct. */
- char *command; /* Points to the first character of the
- * command's source before substitutions. */
- int numChars; /* The number of characters in the
- * command's source. */
- register int objc; /* Number of arguments for the command. */
- Tcl_Obj *objv[]; /* Pointers to Tcl_Obj of each argument. */
- {
- Interp *iPtr = (Interp *) interp;
- register char **argv;
- register int i;
- int length;
- char *p;
-
- /*
- * Get the string rep from the objv argument objects and place their
- * pointers in argv. First make sure argv is large enough to hold the
- * objc args plus 1 extra word for the zero end-of-argv word.
- * THIS FAILS IF AN OBJECT'S STRING REP CONTAINS NULLS.
- */
-
- argv = (char **) ckalloc((unsigned)(objc + 1) * sizeof(char *));
- for (i = 0; i < objc; i++) {
- argv[i] = Tcl_GetStringFromObj(objv[i], &length);
- }
- argv[objc] = 0;
-
- /*
- * Copy the command characters into a new string.
- */
-
- p = (char *) ckalloc((unsigned) (numChars + 1));
- memcpy((VOID *) p, (VOID *) command, (size_t) numChars);
- p[numChars] = '\0';
-
- /*
- * Call the trace procedure then free allocated storage.
- */
-
- (*tracePtr->proc)(tracePtr->clientData, interp, iPtr->numLevels,
- p, cmdPtr->proc, cmdPtr->clientData, objc, argv);
-
- ckfree((char *) argv);
- ckfree((char *) p);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * GetSrcInfoForPc --
- *
- * Given a program counter value, finds the closest command in the
- * bytecode code unit's CmdLocation array and returns information about
- * that command's source: a pointer to its first byte and the number of
- * characters.
- *
- * Results:
- * If a command is found that encloses the program counter value, a
- * pointer to the command's source is returned and the length of the
- * source is stored at *lengthPtr. If multiple commands resulted in
- * code at pc, information about the closest enclosing command is
- * returned. If no matching command is found, NULL is returned and
- * *lengthPtr is unchanged.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- static char *
- GetSrcInfoForPc(pc, codePtr, lengthPtr)
- unsigned char *pc; /* The program counter value for which to
- * return the closest command's source info.
- * This points to a bytecode instruction
- * in codePtr's code. */
- ByteCode* codePtr; /* The bytecode sequence in which to look
- * up the command source for the pc. */
- int *lengthPtr; /* If non-NULL, the location where the
- * length of the command's source should be
- * stored. If NULL, no length is stored. */
- {
- register int pcOffset = (pc - codePtr->codeStart);
- int numCmds = codePtr->numCommands;
- unsigned char *codeDeltaNext, *codeLengthNext;
- unsigned char *srcDeltaNext, *srcLengthNext;
- int codeOffset, codeLen, codeEnd, srcOffset, srcLen, delta, i;
- int bestDist = INT_MAX; /* Distance of pc to best cmd's start pc. */
- int bestSrcOffset = -1; /* Initialized to avoid compiler warning. */
- int bestSrcLength = -1; /* Initialized to avoid compiler warning. */
-
- if ((pcOffset < 0) || (pcOffset >= codePtr->numCodeBytes)) {
- return NULL;
- }
-
- /*
- * Decode the code and source offset and length for each command. The
- * closest enclosing command is the last one whose code started before
- * pcOffset.
- */
-
- codeDeltaNext = codePtr->codeDeltaStart;
- codeLengthNext = codePtr->codeLengthStart;
- srcDeltaNext = codePtr->srcDeltaStart;
- srcLengthNext = codePtr->srcLengthStart;
- codeOffset = srcOffset = 0;
- for (i = 0; i < numCmds; i++) {
- if ((unsigned int) (*codeDeltaNext) == (unsigned int) 0xFF) {
- codeDeltaNext++;
- delta = TclGetInt4AtPtr(codeDeltaNext);
- codeDeltaNext += 4;
- } else {
- delta = TclGetInt1AtPtr(codeDeltaNext);
- codeDeltaNext++;
- }
- codeOffset += delta;
-
- if ((unsigned int) (*codeLengthNext) == (unsigned int) 0xFF) {
- codeLengthNext++;
- codeLen = TclGetInt4AtPtr(codeLengthNext);
- codeLengthNext += 4;
- } else {
- codeLen = TclGetInt1AtPtr(codeLengthNext);
- codeLengthNext++;
- }
- codeEnd = (codeOffset + codeLen - 1);
-
- if ((unsigned int) (*srcDeltaNext) == (unsigned int) 0xFF) {
- srcDeltaNext++;
- delta = TclGetInt4AtPtr(srcDeltaNext);
- srcDeltaNext += 4;
- } else {
- delta = TclGetInt1AtPtr(srcDeltaNext);
- srcDeltaNext++;
- }
- srcOffset += delta;
-
- if ((unsigned int) (*srcLengthNext) == (unsigned int) 0xFF) {
- srcLengthNext++;
- srcLen = TclGetInt4AtPtr(srcLengthNext);
- srcLengthNext += 4;
- } else {
- srcLen = TclGetInt1AtPtr(srcLengthNext);
- srcLengthNext++;
- }
-
- if (codeOffset > pcOffset) { /* best cmd already found */
- break;
- } else if (pcOffset <= codeEnd) { /* this cmd's code encloses pc */
- int dist = (pcOffset - codeOffset);
- if (dist <= bestDist) {
- bestDist = dist;
- bestSrcOffset = srcOffset;
- bestSrcLength = srcLen;
- }
- }
- }
-
- if (bestDist == INT_MAX) {
- return NULL;
- }
-
- if (lengthPtr != NULL) {
- *lengthPtr = bestSrcLength;
- }
- return (codePtr->source + bestSrcOffset);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TclGetExceptionRangeForPc --
- *
- * Procedure that given a program counter value, returns the closest
- * enclosing ExceptionRange that matches the kind requested.
- *
- * Results:
- * In the normal case, catchOnly is 0 (false) and this procedure
- * returns a pointer to the most closely enclosing ExceptionRange
- * structure regardless of whether it is a loop or catch exception
- * range. This is appropriate when processing a TCL_BREAK or
- * TCL_CONTINUE, which will be "handled" either by a loop exception
- * range or a closer catch range. If catchOnly is nonzero (true), this
- * procedure ignores loop exception ranges and returns a pointer to the
- * closest catch range. If no matching ExceptionRange is found that
- * encloses pc, a NULL is returned.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- ExceptionRange *
- TclGetExceptionRangeForPc(pc, catchOnly, codePtr)
- unsigned char *pc; /* The program counter value for which to
- * search for a closest enclosing exception
- * range. This points to a bytecode
- * instruction in codePtr's code. */
- int catchOnly; /* If 0, consider either loop or catch
- * ExceptionRanges in search. Otherwise
- * consider only catch ranges (and ignore
- * any closer loop ranges). */
- ByteCode* codePtr; /* Points to the ByteCode in which to search
- * for the enclosing ExceptionRange. */
- {
- ExceptionRange *rangeArrayPtr = codePtr->excRangeArrayPtr;
- int numRanges = codePtr->numExcRanges;
- register ExceptionRange *rangePtr;
- int codeOffset = (pc - codePtr->codeStart);
- register int i, level;
-
- for (level = codePtr->maxExcRangeDepth; level >= 0; level--) {
- for (i = 0; i < numRanges; i++) {
- rangePtr = &(rangeArrayPtr[i]);
- if (rangePtr->nestingLevel == level) {
- int start = rangePtr->codeOffset;
- int end = (start + rangePtr->numCodeBytes);
- if ((start <= codeOffset) && (codeOffset < end)) {
- if ((!catchOnly)
- || (rangePtr->type == CATCH_EXCEPTION_RANGE)) {
- return rangePtr;
- }
- }
- }
- }
- }
- return NULL;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * Math Functions --
- *
- * This page contains the procedures that implement all of the
- * built-in math functions for expressions.
- *
- * Results:
- * Each procedure returns TCL_OK if it succeeds and pushes an
- * Tcl object holding the result. If it fails it returns TCL_ERROR
- * and leaves an error message in the interpreter's result.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- ExprUnaryFunc(interp, eePtr, clientData)
- Tcl_Interp *interp; /* The interpreter in which to execute the
- * function. */
- ExecEnv *eePtr; /* Points to the environment for executing
- * the function. */
- ClientData clientData; /* Contains the address of a procedure that
- * takes one double argument and returns a
- * double result. */
- {
- StackItem *stackPtr; /* Cached evaluation stack base pointer. */
- register int stackTop; /* Cached top index of evaluation stack. */
- register Tcl_Obj *valuePtr;
- Tcl_ObjType *tPtr;
- double d, dResult;
- long i;
- int result = TCL_OK;
-
- double (*func) _ANSI_ARGS_((double)) =
- (double (*)_ANSI_ARGS_((double))) clientData;
-
- /*
- * Set stackPtr and stackTop from eePtr.
- */
-
- CACHE_STACK_INFO();
-
- /*
- * Pop the function's argument from the evaluation stack. Convert it
- * to a double if necessary.
- */
-
- valuePtr = POP_OBJECT();
- tPtr = valuePtr->typePtr;
-
- if (tPtr == &tclIntType) {
- d = (double) valuePtr->internalRep.longValue;
- } else if (tPtr == &tclDoubleType) {
- d = valuePtr->internalRep.doubleValue;
- } else { /* FAILS IF STRING REP HAS NULLS */
- char *s = Tcl_GetStringFromObj(valuePtr, (int *) NULL);
-
- if (TclLooksLikeInt(s)) {
- result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i);
- d = (double) valuePtr->internalRep.longValue;
- } else {
- result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, valuePtr, &d);
- }
- if (result != TCL_OK) {
- Tcl_ResetResult(interp);
- Tcl_AppendToObj(Tcl_GetObjResult(interp),
- "argument to math function didn't have numeric value", -1);
- goto done;
- }
- }
-
- errno = 0;
- dResult = (*func)(d);
- if ((errno != 0) || IS_NAN(dResult) || IS_INF(dResult)) {
- TclExprFloatError(interp, dResult);
- result = TCL_ERROR;
- goto done;
- }
-
- /*
- * Push a Tcl object holding the result.
- */
-
- PUSH_OBJECT(Tcl_NewDoubleObj(dResult));
-
- /*
- * Reflect the change to stackTop back in eePtr.
- */
-
- done:
- Tcl_DecrRefCount(valuePtr);
- DECACHE_STACK_INFO();
- return result;
- }
-
- static int
- ExprBinaryFunc(interp, eePtr, clientData)
- Tcl_Interp *interp; /* The interpreter in which to execute the
- * function. */
- ExecEnv *eePtr; /* Points to the environment for executing
- * the function. */
- ClientData clientData; /* Contains the address of a procedure that
- * takes two double arguments and
- * returns a double result. */
- {
- StackItem *stackPtr; /* Cached evaluation stack base pointer. */
- register int stackTop; /* Cached top index of evaluation stack. */
- register Tcl_Obj *valuePtr, *value2Ptr;
- Tcl_ObjType *tPtr;
- double d1, d2, dResult;
- long i;
- char *s;
- int result = TCL_OK;
-
- double (*func) _ANSI_ARGS_((double, double))
- = (double (*)_ANSI_ARGS_((double, double))) clientData;
-
- /*
- * Set stackPtr and stackTop from eePtr.
- */
-
- CACHE_STACK_INFO();
-
- /*
- * Pop the function's two arguments from the evaluation stack. Convert
- * them to doubles if necessary.
- */
-
- value2Ptr = POP_OBJECT();
- valuePtr = POP_OBJECT();
-
- tPtr = valuePtr->typePtr;
- if (tPtr == &tclIntType) {
- d1 = (double) valuePtr->internalRep.longValue;
- } else if (tPtr == &tclDoubleType) {
- d1 = valuePtr->internalRep.doubleValue;
- } else { /* FAILS IF STRING REP HAS NULLS */
- s = Tcl_GetStringFromObj(valuePtr, (int *) NULL);
- if (TclLooksLikeInt(s)) {
- result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i);
- d1 = (double) valuePtr->internalRep.longValue;
- } else {
- result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, valuePtr, &d1);
- }
- if (result != TCL_OK) {
- badArg:
- Tcl_ResetResult(interp);
- Tcl_AppendToObj(Tcl_GetObjResult(interp),
- "argument to math function didn't have numeric value", -1);
- goto done;
- }
- }
-
- tPtr = value2Ptr->typePtr;
- if (tPtr == &tclIntType) {
- d2 = value2Ptr->internalRep.longValue;
- } else if (tPtr == &tclDoubleType) {
- d2 = value2Ptr->internalRep.doubleValue;
- } else { /* FAILS IF STRING REP HAS NULLS */
- s = Tcl_GetStringFromObj(value2Ptr, (int *) NULL);
- if (TclLooksLikeInt(s)) {
- result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, value2Ptr, &i);
- d2 = (double) value2Ptr->internalRep.longValue;
- } else {
- result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, value2Ptr, &d2);
- }
- if (result != TCL_OK) {
- goto badArg;
- }
- }
-
- errno = 0;
- dResult = (*func)(d1, d2);
- if ((errno != 0) || IS_NAN(dResult) || IS_INF(dResult)) {
- TclExprFloatError(interp, dResult);
- result = TCL_ERROR;
- goto done;
- }
-
- /*
- * Push a Tcl object holding the result.
- */
-
- PUSH_OBJECT(Tcl_NewDoubleObj(dResult));
-
- /*
- * Reflect the change to stackTop back in eePtr.
- */
-
- done:
- Tcl_DecrRefCount(valuePtr);
- Tcl_DecrRefCount(value2Ptr);
- DECACHE_STACK_INFO();
- return result;
- }
-
- static int
- ExprAbsFunc(interp, eePtr, clientData)
- Tcl_Interp *interp; /* The interpreter in which to execute the
- * function. */
- ExecEnv *eePtr; /* Points to the environment for executing
- * the function. */
- ClientData clientData; /* Ignored. */
- {
- StackItem *stackPtr; /* Cached evaluation stack base pointer. */
- register int stackTop; /* Cached top index of evaluation stack. */
- register Tcl_Obj *valuePtr;
- Tcl_ObjType *tPtr;
- long i, iResult;
- double d, dResult;
- int result = TCL_OK;
-
- /*
- * Set stackPtr and stackTop from eePtr.
- */
-
- CACHE_STACK_INFO();
-
- /*
- * Pop the argument from the evaluation stack.
- */
-
- valuePtr = POP_OBJECT();
- tPtr = valuePtr->typePtr;
-
- if (tPtr == &tclIntType) {
- i = valuePtr->internalRep.longValue;
- } else if (tPtr == &tclDoubleType) {
- d = valuePtr->internalRep.doubleValue;
- } else { /* FAILS IF STRING REP HAS NULLS */
- char *s = Tcl_GetStringFromObj(valuePtr, (int *) NULL);
-
- if (TclLooksLikeInt(s)) {
- result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i);
- } else {
- result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, valuePtr, &d);
- }
- if (result != TCL_OK) {
- Tcl_ResetResult(interp);
- Tcl_AppendToObj(Tcl_GetObjResult(interp),
- "argument to math function didn't have numeric value", -1);
- goto done;
- }
- tPtr = valuePtr->typePtr;
- }
-
- /*
- * Push a Tcl object with the result.
- */
-
- if (tPtr == &tclIntType) {
- if (i < 0) {
- iResult = -i;
- if (iResult < 0) {
- Tcl_ResetResult(interp);
- Tcl_AppendToObj(Tcl_GetObjResult(interp),
- "integer value too large to represent", -1);
- Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW",
- "integer value too large to represent", (char *) NULL);
- result = TCL_ERROR;
- goto done;
- }
- } else {
- iResult = i;
- }
- PUSH_OBJECT(Tcl_NewLongObj(iResult));
- } else {
- if (d < 0.0) {
- dResult = -d;
- } else {
- dResult = d;
- }
- if (IS_NAN(dResult) || IS_INF(dResult)) {
- TclExprFloatError(interp, dResult);
- result = TCL_ERROR;
- goto done;
- }
- PUSH_OBJECT(Tcl_NewDoubleObj(dResult));
- }
-
- /*
- * Reflect the change to stackTop back in eePtr.
- */
-
- done:
- Tcl_DecrRefCount(valuePtr);
- DECACHE_STACK_INFO();
- return result;
- }
-
- static int
- ExprDoubleFunc(interp, eePtr, clientData)
- Tcl_Interp *interp; /* The interpreter in which to execute the
- * function. */
- ExecEnv *eePtr; /* Points to the environment for executing
- * the function. */
- ClientData clientData; /* Ignored. */
- {
- StackItem *stackPtr; /* Cached evaluation stack base pointer. */
- register int stackTop; /* Cached top index of evaluation stack. */
- register Tcl_Obj *valuePtr;
- double dResult;
- long i;
- int result = TCL_OK;
-
- /*
- * Set stackPtr and stackTop from eePtr.
- */
-
- CACHE_STACK_INFO();
-
- /*
- * Pop the argument from the evaluation stack.
- */
-
- valuePtr = POP_OBJECT();
- if (valuePtr->typePtr == &tclIntType) {
- dResult = (double) valuePtr->internalRep.longValue;
- } else if (valuePtr->typePtr == &tclDoubleType) {
- dResult = valuePtr->internalRep.doubleValue;
- } else { /* FAILS IF STRING REP HAS NULLS */
- char *s = Tcl_GetStringFromObj(valuePtr, (int *) NULL);
-
- if (TclLooksLikeInt(s)) {
- result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i);
- dResult = (double) valuePtr->internalRep.longValue;
- } else {
- result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, valuePtr,
- &dResult);
- }
- if (result != TCL_OK) {
- Tcl_ResetResult(interp);
- Tcl_AppendToObj(Tcl_GetObjResult(interp),
- "argument to math function didn't have numeric value", -1);
- goto done;
- }
- }
-
- /*
- * Push a Tcl object with the result.
- */
-
- PUSH_OBJECT(Tcl_NewDoubleObj(dResult));
-
- /*
- * Reflect the change to stackTop back in eePtr.
- */
-
- done:
- Tcl_DecrRefCount(valuePtr);
- DECACHE_STACK_INFO();
- return result;
- }
-
- static int
- ExprIntFunc(interp, eePtr, clientData)
- Tcl_Interp *interp; /* The interpreter in which to execute the
- * function. */
- ExecEnv *eePtr; /* Points to the environment for executing
- * the function. */
- ClientData clientData; /* Ignored. */
- {
- StackItem *stackPtr; /* Cached evaluation stack base pointer. */
- register int stackTop; /* Cached top index of evaluation stack. */
- register Tcl_Obj *valuePtr;
- Tcl_ObjType *tPtr;
- long i = 0; /* Initialized to avoid compiler warning. */
- long iResult;
- double d;
- int result = TCL_OK;
-
- /*
- * Set stackPtr and stackTop from eePtr.
- */
-
- CACHE_STACK_INFO();
-
- /*
- * Pop the argument from the evaluation stack.
- */
-
- valuePtr = POP_OBJECT();
- tPtr = valuePtr->typePtr;
-
- if (tPtr == &tclIntType) {
- i = valuePtr->internalRep.longValue;
- } else if (tPtr == &tclDoubleType) {
- d = valuePtr->internalRep.doubleValue;
- } else { /* FAILS IF STRING REP HAS NULLS */
- char *s = Tcl_GetStringFromObj(valuePtr, (int *) NULL);
-
- if (TclLooksLikeInt(s)) {
- result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i);
- } else {
- result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, valuePtr, &d);
- }
- if (result != TCL_OK) {
- Tcl_ResetResult(interp);
- Tcl_AppendToObj(Tcl_GetObjResult(interp),
- "argument to math function didn't have numeric value", -1);
- goto done;
- }
- tPtr = valuePtr->typePtr;
- }
-
- /*
- * Push a Tcl object with the result.
- */
-
- if (tPtr == &tclIntType) {
- iResult = i;
- } else {
- if (d < 0.0) {
- if (d < (double) (long) LONG_MIN) {
- tooLarge:
- Tcl_ResetResult(interp);
- Tcl_AppendToObj(Tcl_GetObjResult(interp),
- "integer value too large to represent", -1);
- Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW",
- "integer value too large to represent", (char *) NULL);
- result = TCL_ERROR;
- goto done;
- }
- } else {
- if (d > (double) LONG_MAX) {
- goto tooLarge;
- }
- }
- if (IS_NAN(d) || IS_INF(d)) {
- TclExprFloatError(interp, d);
- result = TCL_ERROR;
- goto done;
- }
- iResult = (long) d;
- }
- PUSH_OBJECT(Tcl_NewLongObj(iResult));
-
- /*
- * Reflect the change to stackTop back in eePtr.
- */
-
- done:
- Tcl_DecrRefCount(valuePtr);
- DECACHE_STACK_INFO();
- return result;
- }
-
- static int
- ExprRandFunc(interp, eePtr, clientData)
- Tcl_Interp *interp; /* The interpreter in which to execute the
- * function. */
- ExecEnv *eePtr; /* Points to the environment for executing
- * the function. */
- ClientData clientData; /* Ignored. */
- {
- StackItem *stackPtr; /* Cached evaluation stack base pointer. */
- register int stackTop; /* Cached top index of evaluation stack. */
- Interp *iPtr = (Interp *) interp;
- double dResult;
- int tmp;
-
- if (!(iPtr->flags & RAND_SEED_INITIALIZED)) {
- iPtr->flags |= RAND_SEED_INITIALIZED;
- iPtr->randSeed = TclpGetClicks();
- }
-
- /*
- * Set stackPtr and stackTop from eePtr.
- */
-
- CACHE_STACK_INFO();
-
- /*
- * Generate the random number using the linear congruential
- * generator defined by the following recurrence:
- * seed = ( IA * seed ) mod IM
- * where IA is 16807 and IM is (2^31) - 1. In order to avoid
- * potential problems with integer overflow, the code uses
- * additional constants IQ and IR such that
- * IM = IA*IQ + IR
- * For details on how this algorithm works, refer to the following
- * papers:
- *
- * S.K. Park & K.W. Miller, "Random number generators: good ones
- * are hard to find," Comm ACM 31(10):1192-1201, Oct 1988
- *
- * W.H. Press & S.A. Teukolsky, "Portable random number
- * generators," Computers in Physics 6(5):522-524, Sep/Oct 1992.
- */
-
- #define RAND_IA 16807
- #define RAND_IM 2147483647
- #define RAND_IQ 127773
- #define RAND_IR 2836
- #define RAND_MASK 123459876
-
- if (iPtr->randSeed == 0) {
- /*
- * Don't allow a 0 seed, since it breaks the generator. Shift
- * it to some other value.
- */
-
- iPtr->randSeed = 123459876;
- }
- tmp = iPtr->randSeed/RAND_IQ;
- iPtr->randSeed = RAND_IA*(iPtr->randSeed - tmp*RAND_IQ) - RAND_IR*tmp;
- if (iPtr->randSeed < 0) {
- iPtr->randSeed += RAND_IM;
- }
- dResult = iPtr->randSeed * (1.0/RAND_IM);
-
- /*
- * Push a Tcl object with the result.
- */
-
- PUSH_OBJECT(Tcl_NewDoubleObj(dResult));
-
- /*
- * Reflect the change to stackTop back in eePtr.
- */
-
- DECACHE_STACK_INFO();
- return TCL_OK;
- }
-
- static int
- ExprRoundFunc(interp, eePtr, clientData)
- Tcl_Interp *interp; /* The interpreter in which to execute the
- * function. */
- ExecEnv *eePtr; /* Points to the environment for executing
- * the function. */
- ClientData clientData; /* Ignored. */
- {
- StackItem *stackPtr; /* Cached evaluation stack base pointer. */
- register int stackTop; /* Cached top index of evaluation stack. */
- Tcl_Obj *valuePtr;
- Tcl_ObjType *tPtr;
- long i = 0; /* Initialized to avoid compiler warning. */
- long iResult;
- double d, temp;
- int result = TCL_OK;
-
- /*
- * Set stackPtr and stackTop from eePtr.
- */
-
- CACHE_STACK_INFO();
-
- /*
- * Pop the argument from the evaluation stack.
- */
-
- valuePtr = POP_OBJECT();
- tPtr = valuePtr->typePtr;
-
- if (tPtr == &tclIntType) {
- i = valuePtr->internalRep.longValue;
- } else if (tPtr == &tclDoubleType) {
- d = valuePtr->internalRep.doubleValue;
- } else { /* FAILS IF STRING REP HAS NULLS */
- char *s = Tcl_GetStringFromObj(valuePtr, (int *) NULL);
-
- if (TclLooksLikeInt(s)) {
- result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i);
- } else {
- result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, valuePtr, &d);
- }
- if (result != TCL_OK) {
- Tcl_ResetResult(interp);
- Tcl_AppendToObj(Tcl_GetObjResult(interp),
- "argument to math function didn't have numeric value", -1);
- goto done;
- }
- tPtr = valuePtr->typePtr;
- }
-
- /*
- * Push a Tcl object with the result.
- */
-
- if (tPtr == &tclIntType) {
- iResult = i;
- } else {
- if (d < 0.0) {
- if (d <= (((double) (long) LONG_MIN) - 0.5)) {
- tooLarge:
- Tcl_ResetResult(interp);
- Tcl_AppendToObj(Tcl_GetObjResult(interp),
- "integer value too large to represent", -1);
- Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW",
- "integer value too large to represent",
- (char *) NULL);
- result = TCL_ERROR;
- goto done;
- }
- temp = (long) (d - 0.5);
- } else {
- if (d >= (((double) LONG_MAX + 0.5))) {
- goto tooLarge;
- }
- temp = (long) (d + 0.5);
- }
- if (IS_NAN(temp) || IS_INF(temp)) {
- TclExprFloatError(interp, temp);
- result = TCL_ERROR;
- goto done;
- }
- iResult = (long) temp;
- }
- PUSH_OBJECT(Tcl_NewLongObj(iResult));
-
- /*
- * Reflect the change to stackTop back in eePtr.
- */
-
- done:
- Tcl_DecrRefCount(valuePtr);
- DECACHE_STACK_INFO();
- return result;
- }
-
- static int
- ExprSrandFunc(interp, eePtr, clientData)
- Tcl_Interp *interp; /* The interpreter in which to execute the
- * function. */
- ExecEnv *eePtr; /* Points to the environment for executing
- * the function. */
- ClientData clientData; /* Ignored. */
- {
- StackItem *stackPtr; /* Cached evaluation stack base pointer. */
- register int stackTop; /* Cached top index of evaluation stack. */
- Interp *iPtr = (Interp *) interp;
- Tcl_Obj *valuePtr;
- Tcl_ObjType *tPtr;
- long i = 0; /* Initialized to avoid compiler warning. */
- int result;
-
- /*
- * Set stackPtr and stackTop from eePtr.
- */
-
- CACHE_STACK_INFO();
-
- /*
- * Pop the argument from the evaluation stack. Use the value
- * to reset the random number seed.
- */
-
- valuePtr = POP_OBJECT();
- tPtr = valuePtr->typePtr;
-
- if (tPtr == &tclIntType) {
- i = valuePtr->internalRep.longValue;
- } else { /* FAILS IF STRING REP HAS NULLS */
- result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i);
- if (result != TCL_OK) {
- Tcl_ResetResult(interp);
- Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "can't use ",
- ((tPtr == &tclDoubleType)? "floating-point value" : "non-numeric string"),
- " as argument to srand", (char *) NULL);
- Tcl_DecrRefCount(valuePtr);
- DECACHE_STACK_INFO();
- return result;
- }
- }
-
- /*
- * Reset the seed.
- */
-
- iPtr->flags |= RAND_SEED_INITIALIZED;
- iPtr->randSeed = i;
-
- /*
- * To avoid duplicating the random number generation code we simply
- * clean up our state and call the real random number function. That
- * function will always succeed.
- */
-
- Tcl_DecrRefCount(valuePtr);
- DECACHE_STACK_INFO();
-
- ExprRandFunc(interp, eePtr, clientData);
- return TCL_OK;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * ExprCallMathFunc --
- *
- * This procedure is invoked to call a non-builtin math function
- * during the execution of an expression.
- *
- * Results:
- * TCL_OK is returned if all went well and the function's value
- * was computed successfully. If an error occurred, TCL_ERROR
- * is returned and an error message is left in the interpreter's
- * result. After a successful return this procedure pushes a Tcl object
- * holding the result.
- *
- * Side effects:
- * None, unless the called math function has side effects.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- ExprCallMathFunc(interp, eePtr, objc, objv)
- Tcl_Interp *interp; /* The interpreter in which to execute the
- * function. */
- ExecEnv *eePtr; /* Points to the environment for executing
- * the function. */
- int objc; /* Number of arguments. The function name is
- * the 0-th argument. */
- Tcl_Obj **objv; /* The array of arguments. The function name
- * is objv[0]. */
- {
- Interp *iPtr = (Interp *) interp;
- StackItem *stackPtr; /* Cached evaluation stack base pointer. */
- register int stackTop; /* Cached top index of evaluation stack. */
- char *funcName;
- Tcl_HashEntry *hPtr;
- MathFunc *mathFuncPtr; /* Information about math function. */
- Tcl_Value args[MAX_MATH_ARGS]; /* Arguments for function call. */
- Tcl_Value funcResult; /* Result of function call as Tcl_Value. */
- register Tcl_Obj *valuePtr;
- Tcl_ObjType *tPtr;
- long i;
- double d;
- int j, k, result;
-
- Tcl_ResetResult(interp);
-
- /*
- * Set stackPtr and stackTop from eePtr.
- */
-
- CACHE_STACK_INFO();
-
- /*
- * Look up the MathFunc record for the function.
- * THIS FAILS IF THE OBJECT'S STRING REP CONTAINS NULLS.
- */
-
- funcName = Tcl_GetStringFromObj(objv[0], (int *) NULL);
- hPtr = Tcl_FindHashEntry(&iPtr->mathFuncTable, funcName);
- if (hPtr == NULL) {
- Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
- "unknown math function \"", funcName, "\"", (char *) NULL);
- result = TCL_ERROR;
- goto done;
- }
- mathFuncPtr = (MathFunc *) Tcl_GetHashValue(hPtr);
- if (mathFuncPtr->numArgs != (objc-1)) {
- panic("ExprCallMathFunc: expected number of args %d != actual number %d",
- mathFuncPtr->numArgs, objc);
- result = TCL_ERROR;
- goto done;
- }
-
- /*
- * Collect the arguments for the function, if there are any, into the
- * array "args". Note that args[0] will have the Tcl_Value that
- * corresponds to objv[1].
- */
-
- for (j = 1, k = 0; j < objc; j++, k++) {
- valuePtr = objv[j];
- tPtr = valuePtr->typePtr;
-
- if (tPtr == &tclIntType) {
- i = valuePtr->internalRep.longValue;
- } else if (tPtr == &tclDoubleType) {
- d = valuePtr->internalRep.doubleValue;
- } else {
- /*
- * Try to convert to int first then double.
- * FAILS IF STRING REP HAS NULLS.
- */
-
- char *s = Tcl_GetStringFromObj(valuePtr, (int *) NULL);
-
- if (TclLooksLikeInt(s)) {
- result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i);
- } else {
- result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL,
- valuePtr, &d);
- }
- if (result != TCL_OK) {
- Tcl_AppendToObj(Tcl_GetObjResult(interp),
- "argument to math function didn't have numeric value", -1);
- goto done;
- }
- tPtr = valuePtr->typePtr;
- }
-
- /*
- * Copy the object's numeric value to the argument record,
- * converting it if necessary.
- */
-
- if (tPtr == &tclIntType) {
- if (mathFuncPtr->argTypes[k] == TCL_DOUBLE) {
- args[k].type = TCL_DOUBLE;
- args[k].doubleValue = i;
- } else {
- args[k].type = TCL_INT;
- args[k].intValue = i;
- }
- } else {
- if (mathFuncPtr->argTypes[k] == TCL_INT) {
- args[k].type = TCL_INT;
- args[k].intValue = (long) d;
- } else {
- args[k].type = TCL_DOUBLE;
- args[k].doubleValue = d;
- }
- }
- }
-
- /*
- * Invoke the function and copy its result back into valuePtr.
- */
-
- tcl_MathInProgress++;
- result = (*mathFuncPtr->proc)(mathFuncPtr->clientData, interp, args,
- &funcResult);
- tcl_MathInProgress--;
- if (result != TCL_OK) {
- goto done;
- }
-
- /*
- * Pop the objc top stack elements and decrement their ref counts.
- */
-
- i = (stackTop - (objc-1));
- while (i <= stackTop) {
- valuePtr = stackPtr[i].o;
- Tcl_DecrRefCount(valuePtr);
- i++;
- }
- stackTop -= objc;
-
- /*
- * Push the call's object result.
- */
-
- if (funcResult.type == TCL_INT) {
- PUSH_OBJECT(Tcl_NewLongObj(funcResult.intValue));
- } else {
- d = funcResult.doubleValue;
- if (IS_NAN(d) || IS_INF(d)) {
- TclExprFloatError(interp, d);
- result = TCL_ERROR;
- goto done;
- }
- PUSH_OBJECT(Tcl_NewDoubleObj(d));
- }
-
- /*
- * Reflect the change to stackTop back in eePtr.
- */
-
- done:
- DECACHE_STACK_INFO();
- return result;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TclExprFloatError --
- *
- * This procedure is called when an error occurs during a
- * floating-point operation. It reads errno and sets
- * interp->objResultPtr accordingly.
- *
- * Results:
- * interp->objResultPtr is set to hold an error message.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- void
- TclExprFloatError(interp, value)
- Tcl_Interp *interp; /* Where to store error message. */
- double value; /* Value returned after error; used to
- * distinguish underflows from overflows. */
- {
- char *s;
-
- Tcl_ResetResult(interp);
- if ((errno == EDOM) || (value != value)) {
- s = "domain error: argument not in valid range";
- Tcl_AppendToObj(Tcl_GetObjResult(interp), s, -1);
- Tcl_SetErrorCode(interp, "ARITH", "DOMAIN", s, (char *) NULL);
- } else if ((errno == ERANGE) || IS_INF(value)) {
- if (value == 0.0) {
- s = "floating-point value too small to represent";
- Tcl_AppendToObj(Tcl_GetObjResult(interp), s, -1);
- Tcl_SetErrorCode(interp, "ARITH", "UNDERFLOW", s, (char *) NULL);
- } else {
- s = "floating-point value too large to represent";
- Tcl_AppendToObj(Tcl_GetObjResult(interp), s, -1);
- Tcl_SetErrorCode(interp, "ARITH", "OVERFLOW", s, (char *) NULL);
- }
- } else { /* FAILS IF STRING REP CONTAINS NULLS */
- char msg[100];
-
- sprintf(msg, "unknown floating-point error, errno = %d", errno);
- Tcl_AppendToObj(Tcl_GetObjResult(interp), msg, -1);
- Tcl_SetErrorCode(interp, "ARITH", "UNKNOWN", msg, (char *) NULL);
- }
- }
-
- #ifdef TCL_COMPILE_STATS
- /*
- *----------------------------------------------------------------------
- *
- * TclLog2 --
- *
- * Procedure used while collecting compilation statistics to determine
- * the log base 2 of an integer.
- *
- * Results:
- * Returns the log base 2 of the operand. If the argument is less
- * than or equal to zero, a zero is returned.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- int
- TclLog2(value)
- register int value; /* The integer for which to compute the
- * log base 2. */
- {
- register int n = value;
- register int result = 0;
-
- while (n > 1) {
- n = n >> 1;
- result++;
- }
- return result;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * EvalStatsCmd --
- *
- * Implements the "evalstats" command that prints instruction execution
- * counts to stdout.
- *
- * Results:
- * Standard Tcl results.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- EvalStatsCmd(unused, interp, argc, argv)
- ClientData unused; /* Unused. */
- Tcl_Interp *interp; /* The current interpreter. */
- int argc; /* The number of arguments. */
- char **argv; /* The argument strings. */
- {
- register double total = 0.0;
- register int i;
- int maxSizeDecade = 0;
- double totalHeaderBytes = (tclNumCompilations * sizeof(ByteCode));
-
- for (i = 0; i < 256; i++) {
- if (instructionCount[i] != 0) {
- total += instructionCount[i];
- }
- }
-
- for (i = 31; i >= 0; i--) {
- if ((tclSourceCount[i] > 0) && (tclByteCodeCount[i] > 0)) {
- maxSizeDecade = i;
- break;
- }
- }
-
- fprintf(stdout, "\nNumber of compilations %ld\n",
- tclNumCompilations);
- fprintf(stdout, "Number of executions %ld\n",
- numExecutions);
- fprintf(stdout, "Average executions/compilation %.0f\n",
- ((float) numExecutions/tclNumCompilations));
-
- fprintf(stdout, "\nInstructions executed %.0f\n",
- total);
- fprintf(stdout, "Average instructions/compile %.0f\n",
- total/tclNumCompilations);
- fprintf(stdout, "Average instructions/execution %.0f\n",
- total/numExecutions);
-
- fprintf(stdout, "\nTotal source bytes %.6g\n",
- tclTotalSourceBytes);
- fprintf(stdout, "Total code bytes %.6g\n",
- tclTotalCodeBytes);
- fprintf(stdout, "Average code/compilation %.0f\n",
- tclTotalCodeBytes/tclNumCompilations);
- fprintf(stdout, "Average code/source %.2f\n",
- tclTotalCodeBytes/tclTotalSourceBytes);
- fprintf(stdout, "Current source bytes %.6g\n",
- tclCurrentSourceBytes);
- fprintf(stdout, "Current code bytes %.6g\n",
- tclCurrentCodeBytes);
- fprintf(stdout, "Current code/source %.2f\n",
- tclCurrentCodeBytes/tclCurrentSourceBytes);
-
- fprintf(stdout, "\nTotal objects allocated %ld\n",
- tclObjsAlloced);
- fprintf(stdout, "Total objects freed %ld\n",
- tclObjsFreed);
- fprintf(stdout, "Current objects: %ld\n",
- (tclObjsAlloced - tclObjsFreed));
-
- fprintf(stdout, "\nBreakdown of code byte requirements:\n");
- fprintf(stdout, " Total bytes Pct of Avg per\n");
- fprintf(stdout, " all code compile\n");
- fprintf(stdout, "Total code %12.6g 100%% %8.2f\n",
- tclTotalCodeBytes, tclTotalCodeBytes/tclNumCompilations);
- fprintf(stdout, "Header %12.6g %8.2f%% %8.2f\n",
- totalHeaderBytes,
- ((totalHeaderBytes * 100.0) / tclTotalCodeBytes),
- totalHeaderBytes/tclNumCompilations);
- fprintf(stdout, "Instructions %12.6g %8.2f%% %8.2f\n",
- tclTotalInstBytes,
- ((tclTotalInstBytes * 100.0) / tclTotalCodeBytes),
- tclTotalInstBytes/tclNumCompilations);
- fprintf(stdout, "Objects %12.6g %8.2f%% %8.2f\n",
- tclTotalObjBytes,
- ((tclTotalObjBytes * 100.0) / tclTotalCodeBytes),
- tclTotalObjBytes/tclNumCompilations);
- fprintf(stdout, "Exception table %12.6g %8.2f%% %8.2f\n",
- tclTotalExceptBytes,
- ((tclTotalExceptBytes * 100.0) / tclTotalCodeBytes),
- tclTotalExceptBytes/tclNumCompilations);
- fprintf(stdout, "Auxiliary data %12.6g %8.2f%% %8.2f\n",
- tclTotalAuxBytes,
- ((tclTotalAuxBytes * 100.0) / tclTotalCodeBytes),
- tclTotalAuxBytes/tclNumCompilations);
- fprintf(stdout, "Command map %12.6g %8.2f%% %8.2f\n",
- tclTotalCmdMapBytes,
- ((tclTotalCmdMapBytes * 100.0) / tclTotalCodeBytes),
- tclTotalCmdMapBytes/tclNumCompilations);
-
- fprintf(stdout, "\nSource and ByteCode size distributions:\n");
- fprintf(stdout, " binary decade source code\n");
- for (i = 0; i <= maxSizeDecade; i++) {
- int decadeLow, decadeHigh;
-
- if (i == 0) {
- decadeLow = 0;
- } else {
- decadeLow = 1 << i;
- }
- decadeHigh = (1 << (i+1)) - 1;
- fprintf(stdout, " %6d -%6d %6d %6d\n",
- decadeLow, decadeHigh,
- tclSourceCount[i], tclByteCodeCount[i]);
- }
-
- fprintf(stdout, "\nInstruction counts:\n");
- for (i = 0; i < 256; i++) {
- if (instructionCount[i]) {
- fprintf(stdout, "%20s %8d %6.2f%%\n",
- opName[i], instructionCount[i],
- (instructionCount[i] * 100.0)/total);
- }
- }
-
- #ifdef TCL_MEM_DEBUG
- fprintf(stdout, "\nHeap Statistics:\n");
- TclDumpMemoryInfo(stdout);
- #endif /* TCL_MEM_DEBUG */
-
- return TCL_OK;
- }
- #endif /* TCL_COMPILE_STATS */
-
- /*
- *----------------------------------------------------------------------
- *
- * Tcl_GetCommandFromObj --
- *
- * Returns the command specified by the name in a Tcl_Obj.
- *
- * Results:
- * Returns a token for the command if it is found. Otherwise, if it
- * can't be found or there is an error, returns NULL.
- *
- * Side effects:
- * May update the internal representation for the object, caching
- * the command reference so that the next time this procedure is
- * called with the same object, the command can be found quickly.
- *
- *----------------------------------------------------------------------
- */
-
- Tcl_Command
- Tcl_GetCommandFromObj(interp, objPtr)
- Tcl_Interp *interp; /* The interpreter in which to resolve the
- * command and to report errors. */
- register Tcl_Obj *objPtr; /* The object containing the command's
- * name. If the name starts with "::", will
- * be looked up in global namespace. Else,
- * looked up first in the current namespace
- * if contextNsPtr is NULL, then in global
- * namespace. */
- {
- Interp *iPtr = (Interp *) interp;
- register ResolvedCmdName *resPtr;
- register Command *cmdPtr;
- Namespace *currNsPtr;
- int result;
-
- /*
- * Get the internal representation, converting to a command type if
- * needed. The internal representation is a ResolvedCmdName that points
- * to the actual command.
- */
-
- if (objPtr->typePtr != &tclCmdNameType) {
- result = tclCmdNameType.setFromAnyProc(interp, objPtr);
- if (result != TCL_OK) {
- return (Tcl_Command) NULL;
- }
- }
- resPtr = (ResolvedCmdName *) objPtr->internalRep.otherValuePtr;
-
- /*
- * Get the current namespace.
- */
-
- if (iPtr->varFramePtr != NULL) {
- currNsPtr = iPtr->varFramePtr->nsPtr;
- } else {
- currNsPtr = iPtr->globalNsPtr;
- }
-
- /*
- * Check the context namespace and the namespace epoch of the resolved
- * symbol to make sure that it is fresh. If not, then force another
- * conversion to the command type, to discard the old rep and create a
- * new one. Note that we verify that the namespace id of the context
- * namespace is the same as the one we cached; this insures that the
- * namespace wasn't deleted and a new one created at the same address
- * with the same command epoch.
- */
-
- cmdPtr = NULL;
- if ((resPtr != NULL)
- && (resPtr->refNsPtr == currNsPtr)
- && (resPtr->refNsId == currNsPtr->nsId)
- && (resPtr->refNsCmdEpoch == currNsPtr->cmdRefEpoch)) {
- cmdPtr = resPtr->cmdPtr;
- if (cmdPtr->cmdEpoch != resPtr->cmdEpoch) {
- cmdPtr = NULL;
- }
- }
-
- if (cmdPtr == NULL) {
- result = tclCmdNameType.setFromAnyProc(interp, objPtr);
- if (result != TCL_OK) {
- return (Tcl_Command) NULL;
- }
- resPtr = (ResolvedCmdName *) objPtr->internalRep.otherValuePtr;
- if (resPtr != NULL) {
- cmdPtr = resPtr->cmdPtr;
- }
- }
-
- if (cmdPtr == NULL) {
- return (Tcl_Command) NULL;
- }
- return (Tcl_Command) cmdPtr;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * FreeCmdNameInternalRep --
- *
- * Frees the resources associated with a cmdName object's internal
- * representation.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Decrements the ref count of any cached ResolvedCmdName structure
- * pointed to by the cmdName's internal representation. If this is
- * the last use of the ResolvedCmdName, it is freed. This in turn
- * decrements the ref count of the Command structure pointed to by
- * the ResolvedSymbol, which may free the Command structure.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- FreeCmdNameInternalRep(objPtr)
- register Tcl_Obj *objPtr; /* CmdName object with internal
- * representation to free. */
- {
- register ResolvedCmdName *resPtr =
- (ResolvedCmdName *) objPtr->internalRep.otherValuePtr;
-
- if (resPtr != NULL) {
- /*
- * Decrement the reference count of the ResolvedCmdName structure.
- * If there are no more uses, free the ResolvedCmdName structure.
- */
-
- resPtr->refCount--;
- if (resPtr->refCount == 0) {
- /*
- * Now free the cached command, unless it is still in its
- * hash table or if there are other references to it
- * from other cmdName objects.
- */
-
- Command *cmdPtr = resPtr->cmdPtr;
- TclCleanupCommand(cmdPtr);
- ckfree((char *) resPtr);
- }
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * DupCmdNameInternalRep --
- *
- * Initialize the internal representation of an cmdName Tcl_Obj to a
- * copy of the internal representation of an existing cmdName object.
- *
- * Results:
- * None.
- *
- * Side effects:
- * "copyPtr"s internal rep is set to point to the ResolvedCmdName
- * structure corresponding to "srcPtr"s internal rep. Increments the
- * ref count of the ResolvedCmdName structure pointed to by the
- * cmdName's internal representation.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- DupCmdNameInternalRep(srcPtr, copyPtr)
- Tcl_Obj *srcPtr; /* Object with internal rep to copy. */
- register Tcl_Obj *copyPtr; /* Object with internal rep to set. */
- {
- register ResolvedCmdName *resPtr =
- (ResolvedCmdName *) srcPtr->internalRep.otherValuePtr;
-
- copyPtr->internalRep.twoPtrValue.ptr1 = (VOID *) resPtr;
- copyPtr->internalRep.twoPtrValue.ptr2 = NULL;
- if (resPtr != NULL) {
- resPtr->refCount++;
- }
- copyPtr->typePtr = &tclCmdNameType;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * SetCmdNameFromAny --
- *
- * Generate an cmdName internal form for the Tcl object "objPtr".
- *
- * Results:
- * The return value is a standard Tcl result. The conversion always
- * succeeds and TCL_OK is returned.
- *
- * Side effects:
- * A pointer to a ResolvedCmdName structure that holds a cached pointer
- * to the command with a name that matches objPtr's string rep is
- * stored as objPtr's internal representation. This ResolvedCmdName
- * pointer will be NULL if no matching command was found. The ref count
- * of the cached Command's structure (if any) is also incremented.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- SetCmdNameFromAny(interp, objPtr)
- Tcl_Interp *interp; /* Used for error reporting if not NULL. */
- register Tcl_Obj *objPtr; /* The object to convert. */
- {
- Interp *iPtr = (Interp *) interp;
- char *name;
- Tcl_Command cmd;
- register Command *cmdPtr;
- Namespace *currNsPtr;
- register ResolvedCmdName *resPtr;
-
- /*
- * Get "objPtr"s string representation. Make it up-to-date if necessary.
- */
-
- name = objPtr->bytes;
- if (name == NULL) {
- name = Tcl_GetStringFromObj(objPtr, (int *) NULL);
- }
-
- /*
- * Find the Command structure, if any, that describes the command called
- * "name". Build a ResolvedCmdName that holds a cached pointer to this
- * Command, and bump the reference count in the referenced Command
- * structure. A Command structure will not be deleted as long as it is
- * referenced from a CmdName object.
- */
-
- cmd = Tcl_FindCommand(interp, name, (Tcl_Namespace *) NULL,
- /*flags*/ 0);
- cmdPtr = (Command *) cmd;
- if (cmdPtr != NULL) {
- /*
- * Get the current namespace.
- */
-
- if (iPtr->varFramePtr != NULL) {
- currNsPtr = iPtr->varFramePtr->nsPtr;
- } else {
- currNsPtr = iPtr->globalNsPtr;
- }
-
- cmdPtr->refCount++;
- resPtr = (ResolvedCmdName *) ckalloc(sizeof(ResolvedCmdName));
- resPtr->cmdPtr = cmdPtr;
- resPtr->refNsPtr = currNsPtr;
- resPtr->refNsId = currNsPtr->nsId;
- resPtr->refNsCmdEpoch = currNsPtr->cmdRefEpoch;
- resPtr->cmdEpoch = cmdPtr->cmdEpoch;
- resPtr->refCount = 1;
- } else {
- resPtr = NULL; /* no command named "name" was found */
- }
-
- /*
- * Free the old internalRep before setting the new one. We do this as
- * late as possible to allow the conversion code, in particular
- * GetStringFromObj, to use that old internalRep. If no Command
- * structure was found, leave NULL as the cached value.
- */
-
- if ((objPtr->typePtr != NULL)
- && (objPtr->typePtr->freeIntRepProc != NULL)) {
- objPtr->typePtr->freeIntRepProc(objPtr);
- }
-
- objPtr->internalRep.twoPtrValue.ptr1 = (VOID *) resPtr;
- objPtr->internalRep.twoPtrValue.ptr2 = NULL;
- objPtr->typePtr = &tclCmdNameType;
- return TCL_OK;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * UpdateStringOfCmdName --
- *
- * Update the string representation for an cmdName object.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Generates a panic.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- UpdateStringOfCmdName(objPtr)
- Tcl_Obj *objPtr; /* CmdName obj to update string rep. */
- {
- /*
- * This procedure is never invoked since the internal representation of
- * a cmdName object is never modified.
- */
-
- panic("UpdateStringOfCmdName should never be invoked");
- }
-
- #ifdef TCL_COMPILE_DEBUG
- /*
- *----------------------------------------------------------------------
- *
- * StringForResultCode --
- *
- * Procedure that returns a human-readable string representing a
- * Tcl result code such as TCL_ERROR.
- *
- * Results:
- * If the result code is one of the standard Tcl return codes, the
- * result is a string representing that code such as "TCL_ERROR".
- * Otherwise, the result string is that code formatted as a
- * sequence of decimal digit characters. Note that the resulting
- * string must not be modified by the caller.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- static char *
- StringForResultCode(result)
- int result; /* The Tcl result code for which to
- * generate a string. */
- {
- static char buf[20];
-
- if ((result >= TCL_OK) && (result <= TCL_CONTINUE)) {
- return resultStrings[result];
- }
- TclFormatInt(buf, result);
- return buf;
- }
- #endif /* TCL_COMPILE_DEBUG */
-